The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Wildcats And Their Development 270-308Go | New | Find | Notify | Tools | Reply | |
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Surely somebody has done it. Butch | ||
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I'm currently having something similar made. Hart is rebarreling my rifle in 270 Redding. I originally wanted a 270-08 or a 270 Savage, but the Redding dies and reamers were already available. I've got some 260 Remington loads that I am going to fireform. I still feel a bit uneasy about firing a 6.5 bullet down the barrel to fireform, but apparently the 270 Redding was designed to get brass by fire forming from 243 Win cartridges and 260 Rem will also work. Once I have my brass formed, I'm going to try the 130 ballistic tips first. | |||
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Heck, I have a .270/.303 so there must be someone who has done it. Arte et Marte | |||
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.270 Redding seems like a great idea. Almost .270 Ballistics from a short action. I think Remington could have done better with that than they did with the .260 The price of knowledge is great but the price of ignorance is even greater. | |||
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Duckboat, What are the differences between a .270-08 and .270 Redding? The price of knowledge is great but the price of ignorance is even greater. | |||
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The 270 Redding is basically the 270-308 with the shoulder blown out to increase case capacity. | |||
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Will someone tell me what this does that a 6.5-08 does not? | |||
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It gives higher velocity with same bullet weight. Bent Fossdal Reiso 5685 Uggdal Norway | |||
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That question can be asked about any cartridge. For example, what does the 6.5-08 (260 Rem) do that the 7mm-08 does not. Or what does the 7mm-08 do that the 308 does not. The 270 version is just one more option available to handloaders. | |||
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I have done both the 27/08 and the "improved" version too. Interesting is the fact that I got 270 Win velocity with virtually every bullet/weigh etc with a 21 1/2" barrel! [shortened Rem 700 barrel]. I still have one of them-- not too sure which one. Both shot very sub MOA. Aloha, Mark When the fear of death is no longer a concern----the Rules of War change!! | |||
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I think a 270-08 would be very cool...does anybody know if it could push a 150 gr to an honest 2750? Mike Legistine actu quod scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.  What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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i believe its called the 270 bobcat. had one years back | |||
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Mike, I would be very suprised if you got 2750 out of a 150-grain .277" bullet and the .308 case. There is a capacity difference of 10 grains of water between the .270 and .308 cases, and personal experience is I only saw ~2950 with a pretty healthy dose of AA3100. My rifle is throated long, and I was able to get 58.5 grains of powder in the case with no real signs of pressure. I didn't strain gauge it, but primer pockets remained tight, there were no extraction problems, no stiff bolt lift, etc. Considering that you are asking for that with probably around 50 grains of powder, you are asking for a lot, as I see it. | |||
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Doubless, I can get 2900FPS out of a BR case necked up to 30cal and 125grn Ballistic Tip. I don't think 2750 with the larger capacity case and 150s would be out of reach. Could be wrong. Butch | |||
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Butch, if you have not yet, you might like this read: http://findarticles.com/p/arti...s_10_47/ai_78130022/ | |||
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Thanks Cliff. | |||
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270-257 Roberts! Or 270-257 BOB AI? 85 grain TSX @ 3,400 and the other light bullets designed for the 6.8 SPC are making the 270 a flexible cart! 85's to 180's A 277 ICL I think it is called will give you more capacity with a simple neck up or down from 7x57 without fire forming and probably close to the 270 Redding and with the 6.8 SPC bullets you can keep it in a short action Think of it as a more flexible 7x57 or 6.5x55 The AI version should get you about 62 grains capacity or 6 grains or 5% off of the 270 Win. A 270-284 will get you the same capacity as the 270 Win. so no compromise from a 270 Win in a short action. If the 270-257 Roberts is too long... try the newly invented right now the 270-6.5x55 or for easy headstamp the 6.8x55 Just stamp a 8 over the 5 in 6.5 Pretty sweet! Hmmm... 6.8x55 Improved would be sweet too. 577 BME 3"500 KILL ALL 358 GREMLIN 404-375 *we band of 45-70ers* (Founder) Single Shot Shooters Society S.S.S.S. (Founder) | |||
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 Makes more sense to me if you were to have a cartridge based on the .308 case in .270 that you would try to make it optimum for game smaller than elk or moose. The cartridge would be a reasonable taper for feeding, a 26 to 30 degree shoulder and a .360" long neck. It would be built on a standard length action and the barrel would be deep throated to handle the heaviest for caliber bullets.  Pressure from 50,000psi to 54,000 psi would be the intent for long lasting barrel life in a cherished hunting rifle. Surely with a well placed shot it would kill a faire sized elk but it would not be the go to prudent rifle selection for such game.  rogerOld age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone.. | |||
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Bartsche... The 270 Win has a loooong neck at .384" 17 degree shoulders or 35 degree measuring both. If you used the 270 reamer to 1.686" or 6.8SPC length and use Carcano or M&S brass and probably have the same capacity. Interesting lol Would be some crazy morph of the 6.5 Grendel/6.8 SPC and 270 Win. 270x1.7" or 6.8x43 
577 BME 3"500 KILL ALL 358 GREMLIN 404-375 *we band of 45-70ers* (Founder) Single Shot Shooters Society S.S.S.S. (Founder) | |||
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In RSA the 270-08 is called a 270SABI. I got 2680 fps with my 270-08 with a 150 gr bullet. Not a hot load. Regards, Bob. | |||
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 Bob, what sort of throating do you have on that rifle? Can the max oal be greater than that of the .308? rogerOld age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone.. | |||
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I got a Tobler barrel (made downunder) put on my Sako bolt action. The barrel has a 1 in 10 twist. I think the barrel is set up to be able to take 150gr bullets. I think it has a deep throat. I have not tried to compare the OAL of my 270-08 to my 308 win. That is an interesting question. I have to see my gunsmith this Friday I can take both rifles and ask him to check. I am in the throes of getting the dummy cases for my stoney creek oal gauge I have a 308 one but not a 270-08 dummy case yet. Regards, Bob. | |||
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Roger, I did not get an answer that made sense to me regarding chamber length. I think the short answer was yes for a longer throat on the 270-08 Regards, Bob. | |||
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Mike, I would have thought that would be achievable, unless you got a "slow" barrel. My 260 can push a 120gr close to 3K FPS and can easily do 2750 with a 139gr bullet. The beauty of a 270/308 is that you can run much faster powders than the 270win, RL15, Benchmark and Varget would work well. Completely off the cuff, but a 270/308 with a good quality 22" barrel should run a 130gr bullet to 3000fps with 41 or 42 grs of Benchmark. Would be sweet. Just because you are paranoid, doesn't mean they are not out to get you.... | |||
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According to my reference material the 270/308 has a cartridge neck length of 0.257", a base to shoulder length of 1.56", shoulder angle 20.24°, shoulder length 0.198", sholder OD 0.454"...the 7mm-08 has a neck length of 0.291", base to shoulder 1.54", shoulder angle 19.39°, shoulder length 0.179", shoulder OD 0.440". Case capacities are 53.9 and 52.23 CC H20. You could make the 270 brass from 7mm-08 cases easy enough, and you always have the choice of throating to whatever length you desire. There have been a whole passel of 270 interations on 257 R, 250 and 300 Sav, 303, 308, 284 and other cases...straight and improved. Personally I would have gone with the 284 case if I already didn't have two 284 Wins already...it is an excellent case for a short action. Other than the fact of having a shooter few others have, the innovations of wildcatting, and hair splitting, I could see very few reasons for the 27O cal that the 7mm wouldn't do better a better job...argumentatively speaking of course, no diss intended... But Jack O' stirred up a whole nuther ball game with his articles, then after the rest of the gun writers and the others that followed finished mis-quoting him, it was all over but the tears. He liked his 270, but the 150 gr bullet was his favorite NOT the 130 gr as has been so often and continually re-quoted. In any event, for those that like the 0.277" bullet, I don't think the game bothers to measure the 0.007" difference in hole size, and any ballistic advantange/disadvantage is mostly in the shooters mind... and on paper...within normal shooting ranges. I have a 15" XP-100 and a 22" switch barrel Ruger in 7mm-08. I have no trouble hitting 2900 fs with 150 gr bullets in the longer bbl rifle...but both like the 130 VMax much better accuracy wise and it is Purple Haze time for sage rats out to about 100 yds and pieces and parts beyond that. Not much good for edible game tho'. Luck | |||
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I have never had love for the 270 bullet and always saw the advantages in the 7 or 6.5mm but only have had a likening of the 270 in advent of the lighter bullets for the 6.8 SPC. With a slew of new 85 to 115 grain bullets there is a "case" for the smaller than 270 win case. A 6.8x55 wildcat in a short action is an interesting idea to me now. 577 BME 3"500 KILL ALL 358 GREMLIN 404-375 *we band of 45-70ers* (Founder) Single Shot Shooters Society S.S.S.S. (Founder) | |||
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Here is a picture that shows the 308, 270-08, and the 270 Redding for comparison purposes. I shot the 270 Redding for the first time this weekend and I am very pleased. The barrel that Hart put on is very accurate, even with the 270-08 loads that I used to form some brass. So far, I have found that the gun likes 49 grains of Rl-19 and the 130 ballistic tip. There are no signs of excessive pressure and I'm sure I could go higher, but I'm not sure I want to, because it is such an accurate load. Maybe I'll try an extra grain next weekend.  | |||
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I live just a short drive from the Redding factory. A friend and I were in picking up a few things and got to talking with the boss. We talked about the 270 Redding. He developed that cartridge for his wife, she wanted a short light rifle with light recoil. He thought the 308 necked to 270 would be the thing, so he built one. This as I recall was in 82 or 83. The only way to know if you can do a thing is to do it. | |||
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Make that 120 grains. Hornady is releasing a 120 SST and Federal has a 120 Fusion both designed for the 6.8. | |||
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I'd be interested in how well those lighter bullets designed for the 6.8 would hold together at higher velocity. I've tried several 130 grain bullets (non-premium cup and core) and they did well when I used them on pig and deer. I really like the 130 Nosler BT. I've heard some people say the BT is too soft for the 270 Win, but with the 270-08 it is just the ticket. I also have some 140 partitions loaded up, but I probably won't use them for hunting unless my son uses it for elk. From what I seen, the softer 130 grain bullets are perfectly suited for the 270-08 on medium game. | |||
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Great article. 270 Win velocity from a lightweight short action would be great. I was looking at the 55mm, 57mm and 284 cases but the more that I read about the Redding and Hornadys superduper powders the more that I like that improved 51mm brass. I'm sure that the 85 & 110 gr TSX and the 95 & 110 gr TTSX would be fine at full speed. The 100 & 110 gr Accubond might be a bit soft so I'd keep them at starting load velocity at first. The point of using these modern-construction light-for-caliber bullets IMO is to make the rifle recoil like a 6.8, 243 or 250 Savage but still have the power for very large game when using heavy bullets. | |||
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WHY? | |||
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You could ask "why?" about any cartridge. Is there a particular reason you ask it about the 270-08? All cartridges are only marginally different from others, so I don't see a reason to be specifically confused about the 270-08. | |||
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Yeah I know, and I do ask why about a bunch of them. There was a period of time in the 90s that I thought if you did not shoot a wildcat you must somehow be misinformed and just not "with it". Standard cartridges were just a litte too "vanilla". BUT, We have so many now that do the same thing. Even in my own battery, I have so many that do same thing with lots of overlap. I mean, for years every conceivable caliber was done on the belted H&H case, then a large contingent of folks complained about the belt, blah, blah, blah,. So then here we go with the WSMs, SAUMs, WSSMs, etc, etc. Then after many years as a wildcat, Charmichaels 6.5 comes out as the 260. Great. No, it seems abandoned but push a 277 bullet in it and it suddenly its a "gap filler" or more efficient or something. You can go that route with almost any caliber. If someone suggest just to get a 270 Win. people will say you can build one lighter if you could get that performance in a short action. But if someone builds an ultra light 270 Win. folks complain about it being too light. I have since gotten rid of most of my wildcats. The only one I have left is a 375 JRS Mag. It sits unstocked right now because I have a standard 375 H&H that will do all I ask. I have since too, turned to using some of the classic calibers, but that is a disease in and of itself also. | |||
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I don't buy or sell a gun depending on whether someone else thinks my gun is too heavy, too light, or a gap filler. It doesn't make me buy or sell a gun if other people like or dislike belts. I don't know anybody who thinks anyone who doesn't shoot a wildcat is somehow misinformed or not "with it". Heck, even many of the classic calibers are subject to the "why?" question. I build guns that I like to shoot and hunt with. That is the bottom line. | |||
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l have had a couple of 270-08's in Ackley Improved,my latest one is on a 700 action with a Hart 1000 yard barrel,it easily gets 3250 fps with a 130 nosler using varget,l aquired some 135 match bullets so lm going to try them soon and see what l get for speed with them,on another note l have never shot any other bullet weights out of this caliber. | |||
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Nosler released a 85 gr E-tip for the 6.8, the BC is a little less than the 95 gr TTSX. Push that to 3000 fps and it'll duplicate the 243 and 250 Savage. | |||
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hello i had using the 270/243ai since 1998, and i love it. realy conford to shoot, no recoil, accurate, and real killer, i use 130grs sierra sbt gameking and nosler combinet tech silver tip. i get 3050fps using imr-4350, primer fed210m, and case w-w. today i have reload all mi orginal 100 cases, for 7 times and they are in exce,ente conditions. i use a steyr model "L" acction and the rifle are nice, well balanced and ligt, barrl krieger, contour #2, 23" here the 270/243 ai ready for fire forming, 270/243ai done, and 308win for comparation  By mexicanhunter at 2009-07-31 here 243win case, 270/243 ready for fireforming, 270/243ai case, 270/243ai done and 308 for camparation.  By mexicanhunter at 2009-07-31 best regards | |||
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A gunsmith friend of mine named Cecil Weems, of Mineral Wells, Texas, did a .270-308 that was written up in Rifle Magazine back in the mid 70s. One of the contributing writers sent him a Browning BLR. Cecil rebarreled and reblued it and provide some loading data. The rifle turned out to be spectacularly accurate all things considered. Cecil was a regular advertiser in Rifle Magazine back then. He died maybe 15 or 20 years ago. | |||
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I think this is inaccurate based on my reading of O'connor from about 1960 until his death. | |||
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