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416 Tanzan; I spent a half-dozen seasons working with my dad and crew on the high seas of parts of the Atlantic, in a commercial fishing vessel. One matter that was cared for as a rule was to keep the vessel balanced because of 10 to 20 ft waves. Below deck, in the hold were compartments for the various species, such as haddock, cod, "Boston blue fish", sole, etc. They we let down through manhole covers. But we had to make sure that if, for example, we had 80,000 lbs they had to be evenly distributed starboard and port side regardless of species so the boat wouldn't be leaning to hard to the port side as an example, in rough seas. In your example above of the 416 Rigby shooting a 350gr at 2820 MV, with an SD of .289 and BC of .444, the results are truly stunning! At first sight they appear better than the load given for the .458 WM. However, I want to balance the "ship". My test results were real based on a different set of ambient conditions. Secondly, my MTE is not entirely based on KE. The ambient conditions are what would normally be expected for a moose hunt in N. Ontario in October: Temp @ 45*F, elevation 1150 ft and RH @ 56%. Using those conditions, at 500 yds your bottom line would be: 500 yds; 1893 fps/2784 ft-lbs. That's -80 fps and -240 ft-lbs. from your numbers... still impressive, but cross-section of bullet is a factor also, and it's only 82% that of a .458-cal. So my terminal effect rate for your 350gr, is 109 MTE. Excellent for "moose-size" game all the way for a big bison at 500 yds!!! BUT, still a bit short of the 120 MTE for the .458 Win Mag. Then, the .416 Rigby will be equal to the .416 Weatherby. Not bad company at all! Bob www.bigbores.ca "Let every created thing give praise to the LORD, for he issued his command, and they came into being" - King David, Psalm 148 (NLT) | |||
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Amen, Fury01. Let us welcome Little Brother Lott into THE MISSION. The prodigal Lott has returned to good standing, now that the Lottite deniers of Big Brother Winchester have stopped their rioting and spewing of lies. Varmint loads with the .458 Lott are quite interesting. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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Brother Bob, Please preach a little review of MTE, or tell me where it is best summarized in your blog, about how it is calculated and calibrated to optimum game weight, and buy a donkey for that in advance. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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The latest that gives a review is March 18, 2019 Rifle Ballistics - A Closer Look - P3 (Archives) There are too many qualifications to go into here, or there, but my study and research to come up with one that made sense to me goes back to at least 2007 when I had correspondence with John Wootters who published his about a year later in a Petersen publication. Of course, I've fine-tuned it over the years. It isn't perfect, and math people will quibble over this or that. But I'm content that it makes a sensible guideline for myself. Depending on how the math is done, it turns out that momentum is the key ingredient as in the TKO formula. I was aware of that. It used to be just TE (Terminal Effect) but has more recently been made more personal (MTE) so as not to give the impression that it has been adopted by a majority of hunters/shooters. I've also used KE and TKO, or just KO because of a more common acceptance of those as a means of comparison of one load with another. They all have some weaknesses, including mine. But I think as a comparative tool it has merit. 2000 ft-lbs at impact from a .308 Win firing a 180gr isn't equal to 2000ft-lbs at impact from a .458 Win Mag firing a 450gr -- surely we all understand that. What makes the difference? Bullet weight and caliber largely, but also impact velocity. So cross-sectional area of the bullet and its SD are also implied even if cancelled out by some math. Anyway -- that's a brief summary. The formula is in the blog address given. MTE x 25 = optimum game weight for soft-skinned game ASSUMING a good bullet to the vitals. For smaller DG such as bear and lion it's 12.5 X MTE. For brain shots it's MTE x 100. So, yes, a 6.5 mm firing a 160gr solid into the brain of an elephant at 2200 fps will kill it DRT because we're not "killing" all 12,000 lbs, but simply the brain that keeps vitals working. Same idea for heart shots, not as fast as brain shots, but lethal. My oldest son's late FIL used to shoot moose in the "hump" with his .30-30's factory ammo -- at 25 to 30 yards. The "hump" was the spine. But then he lived next door to the moose! My formula has in mind any legitimate shot. That might be an angling shot from the rear. I've shot several going-away bears like that. Hope this is helpful. Then, as I've pointed out many times... there's a certain amount of mystery involved, including the will of an animal to survive, especially when its adrenaline is in charge! Bob www.bigbores.ca "Let every created thing give praise to the LORD, for he issued his command, and they came into being" - King David, Psalm 148 (NLT) | |||
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I do believe that the Torpedo 528 grain load would be very effective on any varmint, no matter how small or large. It might even be useful for whales. On second thought, leave whales to the .600 crowd! That is game that needs a 12 gauge FH! NRA Life Member testa virtus magna minimum | |||
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Thanks for your hospitality. | |||
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Here is the gem from Bob's March 7, 2019 blog:
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OK, Bob may be "certifiable" which means he ain't dead yet, a good thing. Just like his MITCHELL TERMINAL EFFECT: MTE = (Bullet Kinetic Energy at Impact) X (Bullet Sectional Density) X (Bullet Cross-Sectional Area) I think it has much to recommend it, especially since it shows a .458 WIN+P beats a .416 Weatherby Magnum. For handiness, here are some bullet cross sectional areas, from page 165 of the A-Square manual (calculate by "pie are squared" if you want more): diameter--inch / area--inch-squared .284 / .0633 .308 / .0745 .323 / .0819 .338 / .0897 .358 / .1007 .366 / .1052 .375 / .1104 .409 / .1314 .416 / .1359 .423 / .1405 .458 / .1647 .468 / .1720 .475 / .1772 .483 / .1832 .488 / .1870 .505 / .2003 .510 / .2043 .585 / .2688 .620 / .3019 MTE is much more useful than the Bwana Saeed Index: BSI = TKO x SD The BS Index is useful only at close range for "Stopping Rifles." .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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In my opinion, the most important factor is having the bullet hit the target in the right place. Bullet placement is the most important variable by far. The next biggest is to hit the target with a big enough bullet. After that, penetration and "splash" have to be combined right. When in doubt, err on the side of penetration. NRA Life Member testa virtus magna minimum | |||
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RIP, buy a couple of donkeys! Bob www.bigbores.ca "Let every created thing give praise to the LORD, for he issued his command, and they came into being" - King David, Psalm 148 (NLT) | |||
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Having spent a few thousand hours studying bullets and ballistics, and a few thousand more in using them, the most important factor by far IS the BULLET. It's chosen FIRST for a given hunt using a particular rifle. Secondly, it's ballistics - velocity. Then becoming a rifleman through practice and experience so that when you pull the trigger the bullet will fly to its intended mark. BUT! Animals don't always cooperate! They might move, or other variables can take place that has nothing to do with the rifles ballistics. In other words we can't blame the rifle or load. " having the bullet hit the target in the right place" isn't always a given! That's on the hunter and/or other variables. It has nothing to do with the rifles ballistics and bullets. They are separate entities. Bob www.bigbores.ca "Let every created thing give praise to the LORD, for he issued his command, and they came into being" - King David, Psalm 148 (NLT) | |||
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Bob, Then I take it you would not mind another excerpt from your blog as a review for latecomers to THE MISSION. A concise "Update" to guide the new converts:
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I'll vouch for Bob's loads, I can do them too. H4198 and H4895 will pretty much cover the spectrum. Post-2016 AA-2230 and AA-2460 are also excellent, and replace H335 for me. I am just now finding out how good AA-2495 is for "reduced" cast bullet loads with pleasingly filled cases and great burn completion at low pressure: .461"/ 407-grain hardcast GC-PCP (3.260" COL) at 2170 fps in a 25" barrel with 72 grains of AA-2495, pressure probably closer to 32,000 PSI than to 40,000 psi, and accurate. Details of loads can be found both at Bob's blog and by searching this thread, THE MISSION. And remember, never use a Lead Sled. Onward to page 210, only 252 pages to go. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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Rip, If I had another life to do this in, I would be trying AA 2495 and Cast in several rifles. I will be eager to see your results! "The liberty enjoyed by the people of these states of worshiping Almighty God agreeably to their conscience, is not only among the choicest of their blessings, but also of their rights." ~George Washington - 1789 | |||
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Hello, I have a CZ wondering what powders & charge are you getting 2300fps from a 500gr Hornady? What reloading dies are best for use with this case? Seating not in the crimping groove those bullets in the mag don't slide out due to recoil? Ron | |||
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"Anarchist" first post, and still only post, signing his name as Ron. Sort of smells of unrepentant Lottite. | |||
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Great link about cast bullet alloys: http://www.lasc.us/CastBulletAlloy.htm It dares to discuss arsenic content and its importance for hardening of water-drop quenched bullets and oven bake heat-treatment. Old-style, clip-on wheel weights have a trace of arsenic. Magnum shot has more. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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Rip, He could be just a Samaritan fallen by the way so lets just encourage him to go search out the data he needs in the previous 209 pages for it is there. Thus if he searches, he will find and the Truth can set him free. Shabbat Shalom Fury01 "The liberty enjoyed by the people of these states of worshiping Almighty God agreeably to their conscience, is not only among the choicest of their blessings, but also of their rights." ~George Washington - 1789 | |||
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I agree, I have read all 210 pages and continue to still look up info for my use in my 458 let him read what the work of others before him, good reading anyways, by the way just spoke to a guy at Accurate powders about AA2230 and the new formulation the RIP told me about, his comment was a couple years ago the did make a change to the powder but it was only to make it less temperature sensitive and that was all,he was impressed at the velocity that we are getting with the 450 Barnes TSX. note: we need a lot of people world wide to call Barnes and tell them we need a 400 grain TSX and mention that since they made a bunch for Buffalo Bore Bullets that there is no reason they can't put it in their product line for the rest of the world even if they were to phase out the 400sp so give them a yell and a lot. Jim | |||
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hydehunter and Fury01 do good work for THE MISSION. Buy a donkey to both. Hoping for sunshine Sunday. Double-bullet regulation of the .458 WIN(-)P with cast bullets, light and heavy, is the goal. All else is just too easy for the .458 Winchester Magnum. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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Weather permitting, I might be able to capture some traces tomorrow, though I have to work it in with a sequence test of .50 BMG rounds with the 775-grain Lehighs I got in last week with some 20N29 powder. And hydehunter - I'd be a buyer of some 400-grain Barnes TSX projectiles, and not just a box of 20! NRA Life Member testa virtus magna minimum | |||
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what it will take is for us to talk to Barnes a lot to get them to do this.I do not have any idea how many Buffalo Bore bought but we need to be calling every week like I do and asking for them you know the squeaky wheel gets the grease, please everyone call them even Lotty shooters | |||
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RIP, he may be a student in the making and the same guy I told on another forum to come over here and ask you some questions, he has a long magnum model 70 action and was asking about re-barreling to a lott, I told him to go standard 458 on that long mag action and seat the bullets out long, he could then outrun a lott, and have cheaper, more available brass to boot. | |||
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Weather didn't cooperate, so I spent a little time assembling the rounds for my next test. All are with a Hornady 480-grain DGS, loaded to 3.20 inch COAL, and crimped in around the center of the cannelure. Cases are all "WW-Super", primers are my old Fed 215's that I used in all other pressure traces to date. The flat nose profile of the DGS makes for a slightly shorter COAL than round noses. Thus the 3.2 inch length. Loads to be tested are 73 grains of: H-335 Ramshot TAC AA-2230 Win 748 I also made one round with the 480 DGS and 73 grains of IMR-4895. I ran out of WW cases, and don't want to mix cases and introduce another variable. I chose a load that is max or under (except for AA-2230, where I went 1 grain above) but above start, with all powders as per manuals with 500 grain RN bullets. The charges all fill the case pretty well, with the 4895 being pretty seriously compressed. Some of these loads may be somewhat +P, some at SAAMI, and some under. I want to test out burn rates for future development, as well as provide some useful info for folks who can't load to long COAL. At the very least, they will be useful for powder selection with the 480 DGS in SAAMI-spec loads. I will report back to THE MISSION the results of my testing when weather permits lighting these off. NRA Life Member testa virtus magna minimum | |||
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Troll LOL still living on your 750 Honda Slug still laughing at that, was told to post here from LRH forum guess it was a waste of my time.. Yes my first post - now we talk motorcycles that run the 1/4 at 160mph and our great govt limits them to 186mph your 0-60 is a lifetime ago measurement by todays standards. Some of us have families and actually have employment, you may consider me a troll, I consider myself part of society that's alive and can not or will not devote every waking second to posting on forums, like you. Sorry if my views vary slightly from yours I can live with it. The info here will get me by with regards to the info I seek. Ron https://shootersreference.com/...8-winchester-magnum/ | |||
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I just get impatient with anyone who calls himself an anarchist, or thinks it is amusing to do so. Considering what is going on in the country right now, not a good handle. I won't be spoon feeding any "Anarchist" unless he is reincarnated with a different handle. BTW, I think anyone who rides a murdercycle is a few fries short of a happy meal. Bob survived and matured well. So did my Father-In-Law who was a Methodist Missionary in Brazil, and otherwise a Mr. Rogers type. Imagine Mr. Rogers on a murdercycle. Hydehunter: Thanks for the reminder. I will keep calling about the Barnes 400-gr TSX too. The Maz: More power to you. Jerry: Anarchist did not have your friend's M70, and he has demonstrated he can do a search and even post links to what he found. I'll be trying to get the .458 WIN(-)P 543-grain FNGC (SAECO #20) flying at sunup. Hoping for double-bullet regulation with smokeless in Alderella Shilen-Ruger the Knik Knocker. I do now have the 46-576N Accurate Molds mould to make a 570-grain FNGC if heavier slow bullet is needed. Dual-cavity brass mould, it has the 44-530P on the other side, for use with BP and paper patch, in Goldie Pedersoli-Ruger .45-2.6" aka .45-100 Sharps Winchester Throated. Life is good. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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RIP, good, maybe the guy I referred over is still pouring through 200+ pages of data and 'entertainment' | |||
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Rip I have a similar visceral reaction to our new visitors handle. I also have spent a lot of time on top of two wheels and a motor though I haven’t had one for 36 years or so. I rode trials bike all over the San Juan mountains in Colorado in younger days. Legal back then. Did the same horseback too, that’s still legal most places. Some no it is not. Hard to believe but true. I do want to reach out to our visiting Samaritan and not walk by on the other side of the road. Thanks for understanding. Sir There are many of us who go before you in age that abhor the over reach of governments. There are some here I would say they think that our government borders on out of control. However, anarchies are not the solution. Why you ask? Because the cure for hate is not more hate. The cure for hate is love. Love brings repentance. Repentance brings reason. I would warn and say inside chaos wolves lie in wait. The current situation is full of wolves seeking to destroy kill and then reign over us. This thread is about reason and thought producing truth just as much as it is the magnificent 458 Winchester Magnum. The 458wm was the foil we have used to tear away myth and produce fact. Facts including a 500 grain at 2300 FPS loaded long over aa2300. We restfully request your understanding. "The liberty enjoyed by the people of these states of worshiping Almighty God agreeably to their conscience, is not only among the choicest of their blessings, but also of their rights." ~George Washington - 1789 | |||
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Anarchist; RIP was copying my blog, and they were not his words but mine. And the motorcycle speed was NOT 160 mph but 60 mph in 4.5 sec. And I'd intended to recommend what has been suggested in answer to your questions: READ THE THREAD as others have done. And that 750 Honda Custom of 1981 was NO SLUG in keeping up with the Corvette in 1982! Neither is the .458 Win Mag in PASSING the Lott shooting 500s at equal PSI and equal length barrels. Adequate proof in this thread for ANYONE who wants to know the TRUTH! Bob www.bigbores.ca "Let every created thing give praise to the LORD, for he issued his command, and they came into being" - King David, Psalm 148 (NLT) | |||
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Fury01 Thank you for your answer to Anarcrist. Love is the answer, but as you know that's God's love not human. Jesus said the whole Law is summed up in "agape"-God's love. And that's not possible for sinful humans (all of us) apart from regeneration by God's Spirit who alone is capable of producing forgiveness and love for our "enemies". Even the strongest willed person can't do that alone apart from God's grace. The Law of Moses failed, the grace of God doesn't. You know that! Bob www.bigbores.ca "Let every created thing give praise to the LORD, for he issued his command, and they came into being" - King David, Psalm 148 (NLT) | |||
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Indeed I do Bob. Thanks for testifying on the matter. "The liberty enjoyed by the people of these states of worshiping Almighty God agreeably to their conscience, is not only among the choicest of their blessings, but also of their rights." ~George Washington - 1789 | |||
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I first heard of agape in one of my Father-In-Law's sermons one Sunday. Great man. He had quit the motoring with two wheels by then. Speaking of great Sundays, I just had one, 73*F, sunny, and just a bit too windy. Oh yeah, the kid next to me at the public range had a short-barreled AR-15 and my chrono gave an error reading every time he shot. His brass was hitting me in the face too. After I started catching his brass and throwing it back at him, he got up and moved to another position, plenty of room there. No sense in spewing hot brass into my face. I am closing in on double bullet regulation. Blackhorn 209 seems most promising. Velocity was about as expected. I will try an over-powder card (like punched from milk carton) in addition to the tiny bit of foam filler. I am not worried about one-hole accuracy for the 543-grainer as it will be used inside of 100 yards. That is same rifle with same sight setting as fired 50-yard target below, and the rifle still has not been cleaned. Smokeless with hardcast/PCP/GC bullets leaves no appreciable fouling after 50 rounds: AA-2495 must need a higher pressure than 13,000 psi to be any good. Velocity about as expected: AA-5744 was a disappointment in being so low in velocity with filler, I do not understand it: Hornady brass and F-215 primer for all loads today. There is no rhyme or reason to some of this, or else there are unknowns ... | |||
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Overall, Blackhorn 209 seems best to me. About 90% net case fill/loading ratio, nice pressure around 28,000 psi with 543-grainer, Not bad extreme spread on velocity. And 3 out of 5 of the bullets were OK on elevation. Might do better on a calm day without AR-15 showers. Cogitating on this: Both bullets have a BC of about 0.300. The SD of the blunt 543-grainer is near .370 and the SD of the pointier 407-grainer is near .270, so even the blunt 543-grainer penetrated the air pretty well. Correcting to MV: 1382 fps for 543-grainer. 2170 fps for 407-grainer. Trajectories: 543-grainer ... +1.7"@50yds ... 0.0"@100yds ... -3.0"@125yds 407-grainer ... +1.7"@50yds ... +3.0"@100yds ... +2.9"@125yds ... +2.1"@150yds ... 0.0"@182yds ... -1.6"@200yds ... -4.6"@225yds That'll work. And so little recoil. To get a heavy and a light hitting same elevation at 100 yards might require a heavier heavy and a lighter and/or slower varmint bullet. 570-grain cast bullet coming up: But maybe a Woodleigh 550-grainer at low MV and a Hornady 350-grainer at higher MV would double-bullet regulate, for the jacketed-bullet crowd ? .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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The 543-grainer goes a lot faster if you want it to, in the mighty .458 WIN+P: For the 543-grainer assumed to have BC of 0.300: If MV is 1382 fps, it will lose 9 fps in first 5 yards >>> 1373 fps instrumental. If MV is 2279 fps, it will lose 14 fps in first 5 yards >>> 2265 fps. So, on the graph above, corrected to MV the 543-grainer at 2279 fps has KE at muzzle = 6262 ft-lbs. MTE = 381 The 543-grainer at 1382 fps MV has KE = 2303 ft-lbs. MTE = 140 .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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RIP; The 543-gr at 1382 fps = 140 MTE is the same as my former .340 WBY shooting a 250 at 3000 fps or my 9.3 x 62 firing the 286-gr at 2622 fps. Something to think about, and I have. Bob www.bigbores.ca "Let every created thing give praise to the LORD, for he issued his command, and they came into being" - King David, Psalm 148 (NLT) | |||
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A science thought on momentum/animals and conservation of momentum and assuming bullet stays in animal. When the bullet stops its momentum is zero but the momentum of flesh/bones (and hide) wil equal the momentum of the bullet. So a bullet with bigger momentum could either mean a bigger weight of flesh/bone moving at the same velocity as caused by bullet of lower momentum or could result in the same weight of flesh/bone moving but moving at higher speed than that caused by the bullet of lower momentum. | |||
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MTE refined for a cast bullet emerging from muzzle at 0.459" groove diameter, and using RCBS external ballistics tool: CSA = 0.1655 Sq.In. for .459-cal bullets SD = 0.276 for 407-grainer SD = 0.368 for 543-grainer BC = 0.300 for both, in this special case 407-grain Bullet: at 0 yards/ 2170 fps MTE = 194 (rounded to nearest unit), momentum = 126 lbs-fps 50 yards/ 2041 fps MTE = 172 100 yards/ 1917 fps MTE = 152 543-grain Bullet: at 0 yards/ 1382 fps MTE = 141, momentum = 107 lbs-fps 50 yards/ 1296 fps MTE = 124 100 yards/ 1221 fps MTE = 109.6 MTE gives the 407-gr@2170 fps a 38% advantage over the 543-gr@1382 fps. Pure momentum gives the 407-gr@2170 fps only 18% advantage over the 543-gr@1382 fps. MTE is doing more than just comparing momentums. I reckon it is not overly weighted toward momentum. Also it is not overly weighted toward velocity/KE, and involves adjustment for downrange velocity loss. Hard to implrove on MTE, the Goldilocks choice of Lethality Indices. At whatever range, MTE = 140 is adequate for moose, according to creator Bob. That would be for general hunting use with expanding bullets. I'll buy that. For the simpler situation of close range elephant with solid bullets, I consider the BS Index to be better than TKO. KISS principle applies to either of those. Or would MTE be better with a bracket for elephant? Muzzle-MTE only, of course. | |||
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HA ! THE MISSION had shrunk from page 210 to 209 before I posted above, now it is down to 208 pages. We have had minor shrinkage in the past as the deniers deleted replies to cover up the evidence of their cognitive impairment. This is bigger. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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If not double-bullet regulating, the .458 WIN cast bullet shooter can find loads from subsonic to past Mach 2 with about any cast bullet that is PC-painted, gas checked, and sized to .461", with hard alloy, just treat those like the usual jacketed bullet of same weight, whether for .458"-grooved or .459"-grooved barrels. Terminal integrity of the bullet is the only concern, apply wisely. 1382 fps with the 543-grainer might be better for elephant brain shooting than the same bullet at 2279 fps. All of the below were fired from a .458 WIN with 23" barrel, .458"-grooved, 1:14" twist, by McGowen. All were accurate. All used same 65.0 grains of AA-2230, same brass (WW) and primer (WLRM). Note the relationship between depth of seating and higher velocity/pressure obtained for a given fixed powder charge used for all six bullets, of different weights. In this trial, the heaviest bullet, seated the deepest (the good ol' 543-gr Saeco #020), gave the highest velocity. Take your pick, they are all good loads. .458 Winchester Magnum Perfection In maxima potentia parvum spatium. Id venit et vicit omnis. | |||
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