Cryogenically treated barrels???

[thefitter]

Experiences, opinions...laughter?

 

[CatShooter]

Experiences, opinions...laughter?

Hahahahahaha.

Does anyone even do that anymore?

It's like breaking barrels and moly - it's a religious kinda thing... you are a believer or you're not.

I am not (on any of the three.)

 

[jonbearman]

Since I own a cryo chamber,It works with chrome moly barrels and seems to have less affect on barrels that dont shoot well. It works to increase wear characteristics the best .We have in the past done alot of race engine parts and 2 stroke parts and blocks.It brings 2 strokes to life.Any ways I took a steel ar-15 barrel that refused to shoot.I put it in with one our loads and put it back on.It went from 2 inch groups to a solid sub 1/2 inch shooter and is still doing it today.I believe in it as I have done alot of tool bits,drills,end mills and they hold an edge better.

 

[Joe Maisto]

Experiences, opinions...laughter?

Well, I certainly am not laughing. I've got one with 2200 rounds through it, and kelbly's man that does their chambering looked at it and said...I don't know how you clean this barrel, but what ever you do....don't change.
I never told him I had it cryoed By kathy & Hobie Bond way back then either !
It still looks new with a borescope, ...shoots better than I am capable of, and thats good enough for me. Incidently, I am a BR groupshooter.

 

[johara1]

I have tried them and i have nothing but good to say, i shot a lot of 50's and 100's with a light gun at 1000. The first shot is in the group out of a clean barrel and they don't walk when heated ........... jim

 

[LHSmith]

Where is the proof that it improves accuracy? We went through this 12- 15 years ago in the BR circuit....for every shooter that claimed it helped, there were a dozen competitors who claimed they ruined a good shooting barrel by sending it in for treatment.
If the current crop of competitors are still having them done.....it's the biggest kept secret in BR.
It does help make the steel easier to machine which is why many barrel makers pre-treat with cryo.

 

[madderg]

Kreiger Barrels use it, and all their barrels shoot great. It helps make machining truer and a bit easier. I'll stick with them. All my Pac-Nor super selects were treated at 300 below...all shot great, and the bore stays good for a lot longer then they should by all rights. That's over a 20 year period or there abouts...

 

[LHSmith]

My post addressed Cryo treating AFTER the rifling process. Before is good, after - not so good .

 

[Joe Maisto]

My post addressed Cryo treating AFTER the rifling process. Before is good, after - not so good .

That is stricktly a matter of opinion or preferance. Read above what Greg Walley said about my barrel. He does the chambering for Kelbly's. It was treated after the rifling as well.

 

[BoydAllen]

When Doug Shilen owned the barrel company, I understand that they did a lot of investigation of the effects of cryo on stainless as far as STRESS RELIEF goes. Bottom line, he did not believe that there was evidence that cryo can stress relieve 416R steel. That is not to say that it has no effect. As I understand it, as it comes from the mill, it has residual austenite that is converted to martensite by cryongenic processing, and it is this homogenization that improves the machining properties. I know a fellow that sent a cut rifled finished barrel to be treated and afterwards it shot worse, enough so that it was useless for competition. I think that the best time to cryo is before machining. When a barrel is given a cryo treatment, there is no way to know what the percentages of the two phases are and how they are distributed in the steel, so any dimensional changes that occur would not be predictable, hence the difference in reported results. (No I am not a metallurgist, but I did stay in an Holiday Inn once. Afar as wear goes, you might ask Kevin Thomas. He did the most extensive test that I am aware of, back in the late 90s when he was with Sierra.

 

[LHSmith]

My post addressed Cryo treating AFTER the rifling process. Before is good, after - not so good .

That is stricktly a matter of opinion or preferance. Read above what Greg Walley said about my barrel. He does the chambering for Kelbly's. It was treated after the rifling as well.

With all due respect Joe, aggs are not won with the cleanest barrel on the line.

 

[thefitter]

My post addressed Cryo treating AFTER the rifling process. Before is good, after - not so good .

That is stricktly a matter of opinion or preferance. Read above what Greg Walley said about my barrel. He does the chambering for Kelbly's. It was treated after the rifling as well.

With all due respect Joe, aggs are not won with the cleanest barrel on the line.

...or underwear.

 

[LHSmith]

My post addressed Cryo treating AFTER the rifling process. Before is good, after - not so good .

That is stricktly a matter of opinion or preferance. Read above what Greg Walley said about my barrel. He does the chambering for Kelbly's. It was treated after the rifling as well.

With all due respect Joe, aggs are not won with the cleanest barrel on the line.

...or underwear.

Just Depends

 

[Joe Maisto]

My post addressed Cryo treating AFTER the rifling process. Before is good, after - not so good .

That is stricktly a matter of opinion or preferance. Read above what Greg Walley said about my barrel. He does the chambering for Kelbly's. It was treated after the rifling as well.

With all due respect Joe, aggs are not won with the cleanest barrel on the line.

...or underwear.

Just Depends

The point was not how clean the barrel was, but in fact ...the condition of the rifling /bore. I would have thought that was understood...

 

[Joe Maisto]

Gentlemen;
On this same topic...It is known that tools , especially cutting tools are sent in to be processed in this same manner. This is done after the tools have been cut, ( as in saw blades , vehicle parts, and/or end mills.
Do you also think they should be cryoed before they are shaped and cut ?
If that be your thoughts, then all who send cutting tools in to be processed in this manner, know nothing about metalurgy, or the benefits of cryogenics ?

 

[BoydAllen]

Did not say any of the above, just reported. Perhaps what is improved in the tools is not what might (or not) be improved in a finished gun barrel. Back in the late 90s I got to know a fellow who had a cryo machine, and did all manner of things, with surprising results. He did entire musical instruments, assembled optical products like binoculars and other thing, cutting tools and some barrels. The list went on and on. He once did a test where he treated loaded rounds of 30-06 military match ammo, and compared the accuracy to untreated. He sent me some. Very unscientifically, I tested it. The treated stuff shot noticeably smaller. Darned if I have any idea why. None of this changes anything that I wrote above. As a friend often says, "It is what it is."

 

[jonbearman]

One of the major problems with cryo treatment is the length of quench at -302.Some companys do a short quench as it saves alot of money from over usage of the liquid nitrogen. I cant discuss the total time we hold at but it is significantly longer than alot of companys doing short runs.I dont think it does much to 416 ss myself however if you research it at other companys like cryo one in florida.They can tell you pretty much what it will do and not do.I know it works on carbon steel,tool bits ,drills,trombones,trumpets.dobro's(steel guitar).It makes musical instruments have brighter sound.The list goes on and on.I worked for gleason works,we produced all the nascar ford 9 inch rear end gears.Everything went to cryo period.Our gears lasted several triials and actual race's.The only reason they were changed was to cut them up for inspection purpose. For you nay sayer's,it has its use's period.

 

[thefitter]

This is why I ask:

http://www.jprifles.com/1.4.1_barrel.php

Thinking about one of these builds.

 

[fdshuster]

Kevin Thomas article appeared in the September 1998 issue of "Precision Shooting", beginning on page 8.

An exhaustive, very controlled test that involved the firing of 17224 rounds of identically loaded 308 ammo, thru 5, 308 barrels of different manufacturer, some chryo'd and some not & Kevin did not know which.

The whole experiment was to determine if chryo treatment had any benefits. You read, you decide.

 

[Raythemanroe]

My Sinclair mag says that Kreiger is Cryo trreated.