Post by davidehickey on Feb 6, 2009 8:44:47 GMT -5
Was just looking at this, www.onecryo.com/firearms.htm Seems to be pretty reasonable for a rifle barrel. A guy I work with bought a Knight Master Hunter that came from the factory with Cryogenic Tempering and he says at the very least it made cleaning easier as it closed the pores. But couldn't comment on whether it helped the accuracy since it came from the factory already tempered. For the money and the fact I have almost a year before deer season I was thinking about sending it in. Anyone have any other info on this?
This is an interesting read on the subject if you want to learn more. Below I just copied a brief section from the book for you to read.
“Cryogenic processing increases wear resistance of metals by creating a denser metallurgical structure. For heat-treated metals it completes the heat-treating process by means of continuation of transforming grain structure. In non-ferrous metals, carbides it allows molecules to readjust their position in relation to each other creating a denser structure by eliminating weak voids in the structure.
Cryogenic Treatment is dependant on how good the initial Heat Treatment was done.”
I'll agree with Jim, our die shop does that process and I've snuck a couple of CF barrels thru there over the years. I couldn't see any difference in accuracy (maybe Richard could) or any easier in cleaning.
On the tooling end we see mixed results, sometimes better tool life, but never worse.
It used to be the "next best thing since sliced bread" with the benchrest crowd. I have had several 6mm ppc barrels cryo'd and could not tell any difference. It seemed to have disappeared for quite some time bu t now I have seen ad's for it again. My opinion is that it is "snake oil" as far as rifle barrels go. There may be something to it in tooling, but could not tell any improvements in accuracy or cleaning. I understand the principle, but it does not seem to do what the cryo people claim it does. Richard
Like Richard said; it used to be the hot new thing. I've had 300 Below out of Decatur Illinois freeze my K-80 barrels and my Knight T-Bolt barrel. Could not tell any difference in the shotgun barrels, but the muzzleloader did become easier to clean. It may have even helped tighten the patterns that the Knight threw- because the thing never grouped, just patterned.