quote:

Originally posted by Cross L:
Michael



It feels great dryfiring, short enough so i can work the bolt from the shoulder. Major thunderstorms rolling in so livefire has to wait.

SSR

OK--And?????


Well in the meantime, I was taking some photos this morning of Docs 600 OK, thought I would throw some comparisons in with one of my 500 MDMs and 458 B&M, the two rifles I am taking to Zim and RSA in a couple of weeks.

Gun Porn!

quote:

Well in the meantime, I was taking some photos this morning of Docs 600 OK, thought I would throw some comparisons in with one of my 500 MDMs and 458 B&M, the two rifles I am taking to Zim and RSA in a couple of weeks.

Getting away from the short rifle, quick pointing carbine approach? Looks like three steps from carbine to bigger to biggest.

quote:

Originally posted by I Bin Therbefor:

quote:

Well in the meantime, I was taking some photos this morning of Docs 600 OK, thought I would throw some comparisons in with one of my 500 MDMs and 458 B&M, the two rifles I am taking to Zim and RSA in a couple of weeks.

Getting away from the short rifle, quick pointing carbine approach? Looks like three steps from carbine to bigger to biggest.

IBT

Here's the deal. The 500 MDM was on the books for a couple of years before I decided to do it. Reason? Getting away from what I wanted, Smaller--Not Bigger! But, I had to do it, as not everyone is a believer in smaller is better.

Now at 8.5 lbs and with a 21 inch barrel the 500 MDM is a SMALL rifle, for it's capabilities. A 500 BBW#13 Solid at 2600 fps, 460 BBW#13 NonCon at 2650 fps, 450 North Fork at 2700 fps and so on, it's a very small rifle for it's capabilities! But still, it's WAY bigger than one of the 18 inch B&Ms! That is no doubt. And, you feel it in short order. It's amazing how much difference that length makes!

Now since I am the "Daddy" of this thing, the 500 MDM, it's my responsibility to take it to the field on it's first outings and prove it's worth! It's already hammered buffalo in Australia, to the dirt. Now it's time to see if it does the same to Cape Buffalo and hippo as well. I'm the "Daddy", the buck stops with me. After this outing, the 500 MDM will only see some very special hunts in the future, maybe some elephant next time, but that will be about it for me. From that point on you will see me with a 50 B&M, 475 B&M, 458 B&M, and the Super Short versions, and at some point I must play with the 9.3 B&M as well, being "Daddy" to these means the responsibility falls on my shoulders just the same as the mighty 500 MDM! Being "Daddy" has it's moments! LOL.........

Michael

Brought to the 1st page for 505 gibbs.

Is has been a while since this page was up.

Yes it was a couple of pages back; thought it needed to be brought back to page one with Michael's hunt reports coming in from SA.

Good Lord, 26 pages of posts, I am trying to pick through this.

Hehehe-

The terminal bullet thread is at 167 pages and its just as important.



SSR

Hey 505

I see you started another thread looking for info. Sam gave some good advice, go to the website, it's got a lot of info there as well, and is always updated as anything new comes on, or new load data, and other things. In the beginning I think this thread has become somewhat dated.

I am still in Africa right now and won't return until Mid July. For the next day or so I will have access to the computer, but may be out of touch for a few days from time to time. If there is anything I can help with let me know, but also Jim and Sam, Cross and lot's of others know what is going on as well and can help answer many things if I am not around, or even if I am around!

Michael

Michael:

Will a 50 B&M Alaskan chamber in a 50 Alaskan? Will a 50 Alaskan chamber in a 50 B&M Alaskan?

quote:

Originally posted by Dave Bush:
Michael:

Will a 50 B&M Alaskan chamber in a 50 Alaskan? Will a 50 Alaskan chamber in a 50 B&M Alaskan?

Dave,

Well I suppose you could get a 50 B&M AK to chamber in a 50 AK, but the problem is that the 50 B&M AK is .500 and the 50 AK is .510, so the 50 BMAK would rattle down the barrel of a 50 AK and a 50 AK would blow a 50 BMAK up, if it did! LOL........

That's the LONG answer!

Short answer, No just don't do it!
M

Dave
Stay tuned on this. I am doing pressure traces this coming week on the 50 B&M Alaskan and the new bullets from CEB and North Fork. Getting velocities up and pressures up to 42000-45000 Max in the Marlins.

When I get them done I will post them. Right now just about finished with the new 450 North Fork and running it with 56/H-4198 at 1885 fps and 44000 PSI. Running perfect. But that is about what I am going to get with the North Fork and stay under pressure.

Working with the 375 BBW#13 Solid and 345 Noncon, and 405 Solid and 375 Noncon as well. But not up to speed with those yet.

Also doing the same bullets in the 50 B&M Super Short. Since I can run 60000 + in the 50 Super Shorts, I already have the 450 North Fork at 1815 fps! Not bad!

Michael

Michael:

I wasn't suggesting it should be done. I was wondering if someone could do it by accident.

I am anxious to hear your results of further testing. I have an idea too and I think I am going to run out and talk to Steve Hornady about it this week.

I just finished loading up a few 400 grain Woodleigh Hydros in my 450 Marlin. I used Accurate 2230. They cycle through my Browning BLR perfectly but the Hydros are really long and it requires significant powder compression.

quote:

I am anxious to hear your results of further testing. I have an idea too and I think I am going to run out and talk to Steve Hornady about it this week.

Dave

In .500 Hornady already has an EXCELLENT bullet, that 500 gr bullet. Runs around 1850 fps in the Marlins and it is a hammer. I have shot giraffe, eland, zebra, wildebeast and such with this bullet at that velocity and it hammers them to the ground. And, it's already flat and is a perfect match with the 50 B&M Alaskan. In fact, in the beginning of the 50 B&M AK, it was the only bullet I cared about shooting in the lever gun.

M

quote:

Originally posted by Dave Bush:
Michael:

I wasn't suggesting it should be done. I was wondering if someone could do it by accident.



I just finished loading up a few 400 grain Woodleigh Hydros in my 450 Marlin. I used Accurate 2230. They cycle through my Browning BLR perfectly but the Hydros are really long and it requires significant powder compression.

I suppose Dave that they could put a 50 BMAK in a .510 gun, but it would hurt anything. I don't think a .510 will fit in reverse.

Not sure on 450 Marlin, but I always had such good results in 45/70 with RL 7.

M

Michael:

I noticed that at Midway, the 500 grain .500 Hornady bullets are on "clearance". I hope that means that Hornady is just redesigning them with a tip like the Woodleigh lever bullets and not discontinuing them.

I want to talk to Steve about something but if Woodleigh brings a 500 grain .500 to market, I am in with a 50 B&M Alaskan. I am only interested in shooting the heavier bullets. If Woodleigh comes through, then you could shoot Hornadys at the range and buy some Woodleighs for hunting. The 450 North Fork bullets would be good too.

Dave

I hope Hornady don't do anything with that 500 gr bullet, it's dead perfect the way it is. Sam even made a die that I can use to point or round the nose so it feeds in the bolt guns too. I have tested that bullet from 1400 to 2100 fps, and it holds together, above 2100 it starts to come apart. Almost perfection at 1800-1900 fps. Perfect lever gun velocity.

I don't like the Woodleigh flat nose much, and the 400 gr version is very very soft in .500. I don't know what Woodleigh has in mind for a heavier bullet? Maybe they will make it tougher?

None the less, I think I have a pretty good range of bullets right now to handle anything I can think of. Between the CEBs, North Fork, and even many of the available bullets.

Michael

Sam's die does a really good job with putting a rounded nose on those Hornady 500gr bullets. I have 500-600 of them and need to get a similar die. Does anyone know where I can order a similar die.

Jim

Sam made my die and it rounds or points those 500 Hornady and other flat nose in .500 to perfection. Feed and function excellent in the bolt guns. Best of both worlds, flat for the lever guns, round for the bolt guns. Sam might go into business making those dies! HEH........

Another matter, I still have your scope here! Have not had time to mess with it! I can send it back if needed? Don't know when I will get a chance actually to start hammering it? Sorry? Very Sorry?


Almost finished with the Pressure Traces on the 50 B&M AK and the new bullets. Here is what I have;

450 North Fork Premium Bonded

7/27/11 450 NF 56/H-4198 Fed 210 1904 1863 40 1884 44578 PSI
7/29/11 450 NF 58/RL 7 Fed 210 1831 1784 46 1807 41001 PSI
7/29/11 450 NF 62/H-322 Fed 210 1852 1818 34 1835 42884 PSI

Seems that is about as good as I am going to do with the 450 North Fork. I had hoped for more 1950-2000 and stay under 45000 PSI. But I did not account for the extra length of the North Fork. Never mind however, 1850 or so is plenty and it does a fantastic job at that velocity!

Moving to the New CEB BBW#13s in .500.

345 CEB BBW#13 Brass NonCon
7/27/11 345 #13 HP 58/H-4198 Fed 210 1992 1979 13 1985 34695 PSI
8/1/11 345 #13 HP 62/H-4198 Fed 210 2140 2131 9 2135 39589 PSI

7/29/11 345 #13 HP 62/RL 7 Fed 210 1955 1931 24 1943 29989 PSI
8/1/11 345 #13 HP 65/RL 7 Fed 210 2027 2014 13 2021 34703 PSI

7/29/11 345 #13 HP 60/IMR 4198 Fed 210 2083 2064 19 2073 39683 PSI

7/29/11 345 #13 HP 64/H-322 Fed 210 1905 1903 2 1904 31118 PSI
8/1/11 345 #13 HP 68/H-322 Fed 210 2048 2033 16 2041 36577 PSI

7/29/11 345 #13 HP 65/RL 10X Fed 210 1998 1980 18 1989 32154 PSI
8/1/11 345 #13 HP 68/RL 10X Fed 210 2112 2092 20 2102 42742 PSI



375 CEB BBW#13 Brass Soid
7/27/11 375 BBW#13 58/H-4198 Fed 210 1968 1947 21 1957 37236 PSI
8/1/11 375 BBW#13 60/H-4198 Fed 210 2001 1993 8 1997 37048 PSI

7/29/11 375 BBW#13 62/RL 7 Fed 210 1938 1922 16 1930 34036 PSI
8/1/11 375 BBW#13 65/RL 7 Fed 210 1995 1988 7 1992 37142 PSI

7/29/11 375 BBW#13 60/IMR 4198 Fed 210 2054 2015 40 2035 41472 PSI

7/29/11 375 BBW#13 64/H-322 Fed 210 1865 1857 8 1861 31306 PSI
8/1/11 375 BBW#13 67/H-322 Fed 210 1995 1994 1 1994 39213 PSI

7/29/11 375 BBW#13 65/RL 10X Fed 210 1973 1940 33 1957 35636 PSI
8/1/11 375 BBW#13 67/RL 10X Fed 210 2032 2027 5 2030 42413 PSI



375 BBW#13 NonCon Brass HP
7/27/11 375 #13HP 58/H-4198 Fed 210 1993 1990 3 1991 38272 PSI
8/1/11 375 #13HP 60/H-4198 Fed 210 2064 2059 5 2062 44107 PSI

7/29/11 375 #13HP 62/RL 7 Fed 210 1979 1964 15 1972 36905 PSI
8/1/11 375 #13HP 64/RL 7 Fed 210 2004 1972 32 1988 39119 PSI

7/29/11 375 #13HP 60/IMR 4198 Fed 210 2080 2074 6 2077 47444 PSI OVERMAX

7/27/11 375 #13HP 64/H-322 Fed 210 1943 1938 5 1941 38930 PSI
8/1/11 375 #13HP 65/H-322 Fed 210 0 0 0 1957 39119 PSI

7/27/11 375 #13HP 64/RL 10X Fed 210 1966 1956 10 1961 39025 PSI
8/1/11 375 #13HP 65/RL 10X Fed 210 2003 1996 7 2000 43260 PSI



405 CEB BBW#13 Brass Solid
7/27/11 405 BBW#13 58/H-4198 Fed 210 1976 1963 13 1969 42978 PSI
8/1/11 405 BBW#13 59/H-4198 Fed 210 1984 1975 9 1980 43260 PSI


7/29/11 405 BBW#13 62/RL 7 Fed 210 1937 1932 5 1934 39683 PSI
8/1/11 405 BBW#13 64/RL 7 Fed 210 1971 1965 6 1968 42319 PSI


7/29/11 405 BBW#13 60/IMR 4198 Fed 210 2052 2008 44 2030 49378 PSI OVER MAX

7/29/11 405 BBW#13 64/H-322 Fed 210 1922 1893 28 1907 39636 PSI
8/1/11 405 BBW#13 65/H-322 Fed 210 1947 1946 1 1947 41754 PSI

7/29/11 405 BBW#13 64/RL 10X Fed 210 1922 1893 28 1907 39636 PSI
8/1/11 405 BBW#13 65/RL 10X Fed 210 1984 1975 9 1979 48068 PSI OVER MAX



I will be loading now some of the 3rd Generation loads, but only with a couple of powders and a couple of bullets as well. I want to up the loads on the 345/375 BBW#13 with H-4198 and a couple of loads with the 375/405s and that will end this run. Then I will move to the 50 B&M Super Short with these same bullets.

Michael

Michael:

I met with Steve and Mitch at Hornady this afternoon. Mitch told me that their 500 grain .500 bullet is not on their discontinue list. However, as you might imagine, they don't sell a lot of them. He thought that it may simply be a matter of Midway putting them on "clearance" because they probably don't sell a lot of them either. Perhaps Midway simply wants to clear out their inventory. Let me know what you hear on the 500 grain Woodleigh .500 bullet.

Can you tell me the approximate cost to convert a Marlin into a 50 B&M Alaskan?

Dave

I figured that Hornady would keep that bullet. It's a good bullet, and I like it for the 50 B&M AK.

Last one I did was in 2008 I think, it was close to $1200 the way I set a rifle up with the NECG Barrel band front sight and rear sight. The price has gone up on those and the installation since then, and I think it would be in the ball park of $1300 or so set up like my rifles. Of course everything depends on how you want it. If you dropped those sights you drop about $300 off the price. But if you do one, do it with those sights, adds a lot of class to the rifle I think!

I have to say that I did not think a lever gun could be so damned accurate. The CEBs are one hole at 50 yds, does not matter velocity, powder, weight, nothing. Did PTs yesterday, if I did my part they were in one hole over and over, every test. I almost posted more of these targets this morning, but I looked at them and it's just boring, same old same!
M

quote:

Another matter, I still have your scope here! Have not had time to mess with it! I can send it back if needed? Don't know when I will get a chance actually to start hammering it? Sorry? Very Sorry?

No need for sorry...life gets busy. Yes if you don't think you'll get to it in the next couple of months go ahead and send it back. I'll send it to Steve for my .423 build in October (hopefully the barrel is ready by then). The matching scope is going to Steve for the .500 build with a few additional parts later this month.

quote:

Sam made my die and it rounds or points those 500 Hornady and other flat nose in .500 to perfection. Feed and function excellent in the bolt guns. Best of both worlds, flat for the lever guns, round for the bolt guns. Sam might go into business making those dies! HEH........

Sam PM'd me and is making a die for me as well. I agree...he needs to go into business selling his machined goods.

Hey Michael,
You've not posted a photograph yet of the full lineup of bullets you're testing in the 50 B&M AK...any chance you'll post one shortly?

quote:

Originally posted by Dave Bush:
Michael:

I met with Steve and Mitch at Hornady this afternoon. Mitch told me that their 500 grain .500 bullet is not on their discontinue list. However, as you might imagine, they don't sell a lot of them. He thought that it may simply be a matter of Midway putting them on "clearance" because they probably don't sell a lot of them either. Perhaps Midway simply wants to clear out their inventory. Let me know what you hear on the 500 grain Woodleigh .500 bullet.

Can you tell me the approximate cost to convert a Marlin into a 50 B&M Alaskan?

Dave

Here is some load data and pressures on the 500 gr Hornady .500 bullet. Just FYI.



2/7/11 500 Hornady 58/RL 7 Fed 210 1837 1789 48 1805 Pressure 39997 PSI
2/7/11 500 Hornady 59/RL 7 Fed 210 1846 1831 15 1838 Pressure 44201 PSI



2/7/11 500 Hornady 60/RL 10X Fed 210 1783 1779 4 1781 Pressure 37942 PSI
2/7/11 500 Hornady 62/RL 10X Fed 210 1836 1833 3 1834 Pressure 42413 PSI


2/8/11 500 Hornady 52/H-4198 Fed 210 1711 1694 17 1703 Pressure 29895 PSI
2/8/11 500 Hornady 56/H-4198 Fed 210 1844 1840 4 1842 Pressure 42248 PSI
2/8/11 500 Hornady 57/H-4198 Fed 210 1878 1868 10 1873 Pressure 45237 PSI


2/8/11 500 Hornady 56/H-322 Fed 210 1572 1568 4 1570 Pressure 25141 PSI
2/8/11 500 Hornady 60/H-322 Fed 210 1786 1778 8 1782 Pressure 38930 PSI
2/8/11 500 Hornady 61/H-322 Fed 210 1821 1807 14 1814 Pressure 41189 PSI
2/8/11 500 Hornady 62/H-322 Fed 210 1845 1838 7 1841 Pressure 42790 PSI

quote:

Originally posted by capoward:
Hey Michael,
You've not posted a photograph yet of the full lineup of bullets you're testing in the 50 B&M AK...any chance you'll post one shortly?

I have not done that on terminals???? Maybe not. I can't remember?

Here are the BBW#13s



Dan and I were talking about these bullets yesterday too. He is going to make some in .510 for the 50 AK guys too.

I tested the NonCons in the Super Short and don't remember posting them either, or even if I documented, but have photos?

Now gosh darn it Michael, we don't want no stinking lightweight coyote bullets. Give us some of those 450 grain North Forks, 500 grain Hornadys, 500 grain CEBs, or those 420 grain Punch Bullets I sent you.

Here you go Dave, some big boy bullets!
HEH

Michael,
Very nice performance from the NF 450gr bullets…no less then we expected.

quote:

Originally posted by Dave Bush:
Now gosh darn it Michael, we don't want no stinking lightweight coyote bullets. Give us some of those 450 grain North Forks, 500 grain Hornadys, 500 grain CEBs, or those 420 grain Punch Bullets I sent you.

Dave,
You’re just upset that those “lightweight coyote bullets” NonCons are putting the stink on the name brand heavy weight bullets! Only way to outperform a lightweight NonCon is with a heavier weight NonCon of the same caliber.

Now c'mon Cappy, you have to admit that those big lead expanded bullets look pretty sweet I was surprised at how well the Sierra did!

LOL… Hey Dave just funnin with you. And yes they do look nice…but not nearly as nice as Brass’ 500gr BBW#13 FN or 460gr HP NonCons!!! But I had to order another 4 boxes of the 500gr Hornady’s when I saw your Midway clearance notice.

A 50 B&M Alaskan with a 500 grain flat nose #13 BBW should be a great penetrator at max velocity of about 1800 FPS. I'm guessing enough for a Texas heart shot on a buff. Maybe trim the case shorter to crimp and feed the longer tip to crimp bullets. What would that length be? 1.85"ish?

quote:

Originally posted by Dave Bush:
Now c'mon Cappy, you have to admit that those big lead expanded bullets look pretty sweet I was surprised at how well the Sierra did!

Dave

I was surprised at the Sierra as well when I started testing them in 2006. The first prototype 50 B&M is now the current 2 inch 50 B&M SA. I tested with it, then took it to Africa on a quick 5 day shoot with Andrew, testing the rifle/cartridge, but more so the bullets. I was using a 500 Hornady at 1875 fps, 400 Sierra at 2000 fps, 385 Remington Core Loc Bonded at 2100 fps, a 375 Barnes X at I forget? HEH...... These were good working velocities in the test work, so that is what I took to the field.

With the 375 Barnes I hammered a wildebeast, got perfect performance no problem. Don't recall shooting anything else with that.

The 385 Remington I shot several impala and it knocked them in the dirt on the spot. Busted one zebra, and it took it down within 30 yds, but I was VERY LUCKY--this is not a zebra bullet. Great for impala type critters.

I shot some impala with the 400 Sierra and it hammered. But I also shot a wildebeast and it did not go 10 yds before piling up stone cold, and I think I have that bullet, and it was test perfect.

Did more work with that 500 Hornady, wildebeast dropped to the shot, zebra went about 25 yds and piled up, giraffe dropped within 10 yds, damned eland ran for a day and a half! Of course I shot him right in the guts too! So that did not help matters! Made him real sick it did! OK, story is, walking up to the zebra we had just shot with the 500 Hornady. Blood, bones and everything all over the ground--Herd of Eland run across off to my right, I swing fast get on the shoulder, bam! OK, he was 75-80 yds out, running, I don't know how to lead for crap, had the right height, but he ran out of the bullet, hit him in the guts! That's the truth of the matter! Got him the next morning with some curve ball solids that were flying in all directions after they hit him! LOL

First outing for any .500 that I know of, and it was a success overall with those bullets. Just got to watch velocities in the bigger 50s. Perfect in the 50 B&M AK and cheap to shoot. That 400 Sierra is super accurate as well. Good fun.

Boomy

No Man, a 500 gr BBW#13 that would be designed to work thru the lever guns would take up ALL THE CASE CAPACITY. Would not be room for powder. Never get 1800 fps with any brass 500 gr bullet that would function and feed. Not even close, I think you might have issues getting to 1600? Just too long and got to have such a short nose to work through the Marlin. For a #13 I have limited that to a 405 Solid, and can get it up to 1950 or so. It should do anything you want with the 50 B&M AK.

Pretty much reached top ends on that today. Started some 1st and 2cd gen PTs with the same bullets in 50 Super Short--which is pretty much equaling and in some cases surpassing the 50 B&M AK because I can run much more pressure in the little bolt guns.

FYI

Michael

Hey Michael,

The 375gr NonCon appears to be identical to the 395gr NonCon except in Brass rather than Copper. Is this correct? And how much shorter is the 345gr NonCon than the 375/395gr NonCons?

quote:

Originally posted by capoward:
Hey Michael,

The 375gr NonCon appears to be identical to the 395gr NonCon except in Brass rather than Copper. Is this correct? And how much shorter is the 345gr NonCon than the 375/395gr NonCons?

Jim

Correct, the 405 BBW#13 Solid and matching 375 BBW#13 NonCon are the brass versions of the 425 BBW#13 Copper and 395 #13 HP Copper.

I will have to measure the 345s----Yes most likely the 375 Brass Solid matched with the 395 Copper would be a match, especially at 50 or so. Pretty much most of these are within an inch of each other or so at 50. Depending on velocity and load.

Michael

Just before shooting the HI BC #13s I finished up most of the 50 B&M Super Short Pressure traces with the new bullets from CEB and North Fork. So I will post a few here just FYI and interest sake. What I find interesting about the Super Short--here we have a 1.65 inch case, 16 inch barrel, bolt gun, same overall length as a 18 inch 50 B&M Alaskan, but we are getting equal or better performance with the same bullet???

OH, that's correct, as good as even I love the levers, we are limited by the pressures! I will take the Marlins to 45000 PSI without question, all day long, but I am not afraid to the the Super Short to 65000 PSI, as a max safe. Normally I stop when satisfied at 60000 plus or minus a bit. That extra 20000 PSI can go a long way!


345 #13HP 46/LilGun Fed 210 2199 2173 26 2187 No Pressure Test
345 #13HP 46/LilGun Fed 210 2194 2179 15 2186 53118 PSI
345 #13HP 48/LilGun Fed 210 2215 2194 21 2204 57533 PSI
345 #13HP 50/LilGun Fed 210 2222 2202 20 2212 66649 PSI--Over Max Pressure

345 #13HP 48/WW 296 Fed 210 2135 2134 1 2135 58192 PSI
345 #13HP 50/WW 296 Fed 210 No Reading Obtaine 0 60989 PSI



375 BBW#13 45/Lilgun Fed 210 2115 2105 10 2109 53930 PSI
375 BBW#13 46/Lilgun Fed 210 2120 2115 5 2118 61812 PSI
375 BBW#13 48/Lilgun Fed 210 2181 2178 3 2179 70123 PSI--OVER MAX PRESSURE

375 BBW#13 46/WW 296 Fed 210 2033 2032 1 2032 58850 PSI
375 BBW#13 48/WW 296 Fed 210 No Reading 0 67893 PSI--Over Max Pressure



375 #13HP 43/LilGun Fed 120 2063 2037 26 2050 55725 PSI
375 #13HP 45/LilGun Fed 120 2063 2062 1 2063 57333 PSI
375 #13HP 47/LilGun Fed 120 2128 2120 8 2124 64116 PSI

375 #13HP 44/WW296 Fed 120 1994 1987 7 1991 57936 PSI



405 BBW#13 42/LilGun Fed 210 1999 1978 21 1990 56820 PSI
405 BBW#13 44/LilGun Fed 210 2031 2009 22 2020 64445 PSI

405 BBW#13 43/WW 296 Fed 210 1915 1907 8 1911 60660 PSI
405 BBW#13 44/WW 296 Fed 210 1938 1936 2 1937 68559 PSI-Over Max Pressure



450 NF 39/LilGun Fed 210 1820 1801 19 1813 56217 PSI
450 NF 40/LilGun Fed 210 1855 1845 10 1850 65103 PSI

450 NF 39/WW 296 Fed 210 1687 1671 16 1679 52103 PSI
450 NF 41/WW 296 Fed 210 1764 1738 26 1751 64281 PSI


450 NF 39/WW 297 Fed 210 1708 1703 5 1705 52926 PSI

Oh and I want to show some of the work done with the North Fork CPS and FPS also.


375 NF-FPS 45/LilGun Fed 210 2059 2041 18 2050 47824 PSI
375 NF-FPS 47/LilGun Fed 210 2122 2099 23 2111 51445 PSI
375 NF-FPS 49/LilGun Fed 210 2198 2196 2 2197 56628 PSI
375 NF-FPS 51/LilGun Fed 210 2249 2222 26 2236 59508 PSI


375 NF-CPS 45/LilGun Fed 210 2103 2087 16 2095 50539 PSI
375 NF-CPS 47/LilGun Fed 210 2145 2140 5 2143 53748 PSI
375 NF-CPS 49/LilGun Fed 210 0 0 0 2222 61977 PSI

Here is a thought for some of you! Boomy, this might be up your alley too! I have the 458 B&M SA in hand now. As you guys know I have a hard time getting much interest in these semi auto things. But I am tasked with getting it up and running, and I don't want to mess with a strain gage on these. I am rather ignorant when it comes to pressures in these things! What do you reckon one should set as upper limits on a DPMS 458 B&M SA? I am guessing 50000 PSI? I don't know?

Cute little cartridge I have to admit!

Big damned rifle however.

And I tell you something else, pulling that big bolt back is a chore! Makes me tired!

Michael

quote:

Originally posted by michael458:
...I have the 458 B&M SA in hand now... What do you reckon one should set as upper limits on a DPMS 458 B&M SA? I am guessing 50000 PSI?

Cute little cartridge I have to admit!

Michael,

I believe the .300 RSAUM has a PMax of 65K psi...and the DPMS was originally chambered for the .300 RSAUM...and as your .458 B&M SA is a derivative of the .300 RSAUM...so I'd say your .458 B&M SA has a PMax of 65K psi!

That 50 super short 405 BBW#13 @ 2,000 is sweet! Seems 43 grains of Lil Gun will be the sweet spot. An excellent in the thick defensive gun cart combo
I can't help but think a 410 Super Short would duplicate the 405 win of 300@ 2,250 ish