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anybody have any recommendations about who to use? Mike 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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Mike, I use a local outfit. Diversified Cryogenics. In on Friday, pick up on Monday. It runs about $65 or so. Jim Kobe 10841 Oxborough Ave So Bloomington MN 55437 952.884.6031 Professional member American Cusom Gunmakers Guild | |||
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I have had a few done and I couldn't tell a difference. Cleans the same, machines the same, and shoots the same. Butch | |||
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Yup, at least from my experience it's a waste of time and money. If there was really something to it I'd think the private barrel MFRs would provide the barrel that way in the first place. | |||
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Mike, I was at Hart barrels in NY getting some work done and discussed at length the cryo treatment concept with Mr Sutton. His point well taken is that the cryo relieves 7% of the residual stress in the steel after heat treating. Since there is I think less than 1% stress left after heat treating, what are you going to get? Therefore I have never persued the idea further.  Member NRA, SCI- Life #358 28+ years now! DRSS, double owner-shooter since 1983, O/U .30-06 Browning Continental set. | |||
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I have used it on four occasions, and in each case it was only to solve a problem. In two instances it was with a M70 Featherweight, one a 7mm-08 and the other in 308. In both of those instances the rifle wouldn't shoot, putting the first few shots on target and then progressively walking. In the case of the 7mm-08 it was about 7-8 inches high and to the right. It was bad enough it was very difficult to even get it sighted in. I pillar bedded the action, free floated the barrel, tried adding a preassure point and nothing helped, it still shot like hell. This was my father's rifle and I really wanted to get it shooting, in fact it was the first rifle I ever bedded and free-floated the barrel that didn't shoot better, this one was much worse. Since it is very close to here, I dropped it off at Badger Cryogenics and had the barreled action treated. Afterwards, that rifle turned into a solid 1 to 1 1/2 MOA shooter and I couldn't have been more pleased. It didn't walk at all, and kept them ALL in the center. I also did it with two 17 Remington AR15 barrels that I made from Lothar Walther blanks. I had them pre-fitted and only had to turn the final O.D on the gas block area on out, but kind of screwed the pooch on that one as I didn't use coolant, etc... Both of those barrels ended up walking a bit as the barrel heated up, not much, maybe 1-2 inches but I treated them also and the change of impact disappeared. They both cleaned up much easier after the treatment too. I won't bother with it unless there is obvious stress in the barrel and in those cases I think it works great and wouldn't hesitate to use it again. Shoot straight, shoot often. Matt | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Gunsmithing Cryogenically treating a barrel...
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