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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cryoing??
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<blockquote data-quote="RBrowning" data-source="post: 29126" data-attributes="member: 412"><p>Cryo treating a barrel is primarially a stress relieving mechanism. A few years ago the popularity of longer range shooting was just begining to rise and so more people were looking for better toys to play with. Also with the economy doing so well, more folks had more $ to spend and were glad to do it on what appeared as a better product. This tended to get the notice of those companies that were seeing a drop in sales of "off the shelf" guns and a rise in the custom guns. Thus the popularity of it a few years ago.</p><p></p><p>Does it work. Yes. If a piece of steel has been machined it will have residule stress in it. Conventional heat treating took most of it out or you would never get a good group. You POI would move as the barrel heated up. Enter Cryo treatment. It relieved more of the stress and gave you a more stable product.</p><p></p><p>Is it the only way to stress relieve a barrrel? No. you can double or triple temper the steel. Each reduces the stress and converts more of the austinite to martinsite than the previous. That is why some of the better barrel makers do it right and see no benifit from cryo treament. Factory barrels probably would be a good canidate for cryo treatment, especially if you notice your POI moving as it heats up.</p><p></p><p>Read Dan Lilja's article at his web site.</p></blockquote><p></p>
[QUOTE="RBrowning, post: 29126, member: 412"] Cryo treating a barrel is primarially a stress relieving mechanism. A few years ago the popularity of longer range shooting was just begining to rise and so more people were looking for better toys to play with. Also with the economy doing so well, more folks had more $ to spend and were glad to do it on what appeared as a better product. This tended to get the notice of those companies that were seeing a drop in sales of "off the shelf" guns and a rise in the custom guns. Thus the popularity of it a few years ago. Does it work. Yes. If a piece of steel has been machined it will have residule stress in it. Conventional heat treating took most of it out or you would never get a good group. You POI would move as the barrel heated up. Enter Cryo treatment. It relieved more of the stress and gave you a more stable product. Is it the only way to stress relieve a barrrel? No. you can double or triple temper the steel. Each reduces the stress and converts more of the austinite to martinsite than the previous. That is why some of the better barrel makers do it right and see no benifit from cryo treament. Factory barrels probably would be a good canidate for cryo treatment, especially if you notice your POI moving as it heats up. Read Dan Lilja's article at his web site. [/QUOTE]
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Cryoing??
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