Barrels, which manufacturer??

[Alex Wheeler]

Reads more like an ad for cryo to me, no data to support claims made. The machinist's handbook touches on cryo and what it does. Stress relief is not one of the benefits. To prove that cryo was in fact a stress relieving process would be quite simple. The fact that it has not been proven says it all. Believe what ever you like on the subject it really doesnt matter. Krieger is my preferred barrel so I am not knocking them. If you pay attention to what is happening in competition you see trends. Some guys will have a real good 7mm while another maker is dominating with their 6mms. Check the equipment lists and see whats winning. If a barrel is winning matches, guaranteed it does not have residual stresses in it, and you can be sure it will cold bore just fine.

 

[THEIS]

Well Vermont Technical Institute and NASA, along with lots of others have done the testing

Here are couple more links that both say it reduces residual stress....
http://web.vtc.edu/mt/114/Research/Ferland/CryogenicTreatment.htm

https://www.google.com/url?sa=t&sou...iJATAP&usg=AFQjCNFLygxSxoa9gigiWNa0TOrZTgKh5Q

THEIS

 

[ELR Researcher]

Of course it "reads" like an "ad" - as I noted, both companies provide cryo treatment of barrels as a service.

BTW, as best I recall, Krieger does in-house cryo of the raw blanks to improve machinability. [Was on the "old" site but not, as best I could find, on the new.] The cryo done by those companies can be done both before and after, though I understand that cryo once done does not need to be redone (e.g., no need to cryp a Krieger after you get it, since the blank was already done before machining).

 

[Alex Wheeler]

Actual testing done by a barrel maker in the steel used for barrels. I have yet to see anything on how cryo relieves stress and if it does, how much. I am always looking for an edge, a way to make my rifles shoot better than the next guy. I have spoke with Hobie Bond about this process. He owns/owned a cryo treatment company. He worked for Kelbly's and fully understands Benchrest accuracy. He would not make the claim to me that stress would be relieved or barrels would shoot better. He's done alot of barrels. For the cost its worth a try, but there is no substitute for proper (heat) stress relieving. Krieger still cryos their blanks before machining. I have had Kriegers with stress that wouldnt shoot, although its very very rare.
http://www.shilen.com/faq.html#question1
http://riflebarrels.com/support/faq/#deepcryogenic

 

[tim_w]

I can not talk specifically to barrel blanks but in the automotive and truck world cryo certainly has an\ effect on brake rotor warpage do to heat build up.

As to the question of how much that would very much depend on the type and amount of induced stress be it from the rod or at various points in the barrel process and for different processes i.e. hammer forge vs button vs cut.

 

[D-mon]

Lothar Walter barrels seems buttoned not hammer forged.
From their own website :
http://www.lothar-walther.com/308.php

 

[TwoMore]

Black Hole weaponry is one of the ones I can think of that Hammer forge's. I would think that process would leave the most stress. The stuff we have cryo'd is stress relieved first, the cryoing process would not take that place, it seems to only enhance the hardness or wear ability, this is a billet transmission that goes in a 400 hp drag atv. The cryoing will get us better life with it but without the stress relieving it wouldnt make it through an event. I know that cryo treated parts do wear better on this platform if the process is done correctly

 

[TwoMore]

One question I have had for a bit is,and it may be a rookie question lol but how can cryo-ing a barrel make it a faster shooting barrel? I have seen this claim from x-caliber, now I have only chambered about 6 or 8 of theirs and they shot great, but I never had them cryo them

 

[Pdvdh]

One question I have had for a bit is,and it may be a rookie question lol but how can cryo-ing a barrel make it a faster shooting barrel? I have seen this claim from x-caliber

Ice crystals... Very slippery.

 

[TwoMore]

Ice crystals... Very slippery.

lol

 

[Mikecr]

If you dont know what barrel you want, look at which barrels are consistently winning Benchrest or f-class matches.

NOT HUNTING. These are not hunting gun barrels, and they're not demonstrating hunting shooting.

 

[bigngreen]

NOT HUNTING. These are not hunting gun barrels, and they're not demonstrating hunting shooting.

You realize that Alex uses the same barrels for hunting guns as record setting bench guns right?

 

[tim_w]

About hammer forged barrels consider one of the most accurate line of high end factory rifles the sako trg22 line are not only hammer forged but also chrome lined. My 22 holds in the 3s with good loads.

That was considered a process that induced the most stress and was thought for only mass produced barrels much as chrome lined was for only 3moa battlefield rifles. Just shows that when tight tolerances are held and proper stress relieving even chf cl barrels can have very consistent repeatable accuracy.

 

[Mikecr]

You realize that Alex uses the same barrels for hunting guns as record setting bench guns right?

Yes, and I realize that bench guns are not hunting guns, and that every hunting barrel brand I've used, is also used by many BR shooters.
So where are we going with this? Appeal to authority? Is there a BR shooter out there using a particular barrel that we should all turn down and put in our hunting guns?
Well then, why?
Is it because his barrel and gun are twice as heavy, and used off sand bags under fixed conditions, after warmup/prefouling/sighters, to shoot record setting groups wherever they happen to hit on a 1moa target?

I believe I've provided reasoning for my views on this. I also respect other views this side of outright logical fallacies(like yours quoted).
Also not trying to start a fight. Just providing inputs for others to consider.