It helps. A friend of mine, was doing it for 5 years or so, and I had quite a bit done there for awhile. It seemed to make a diff. Thats about all I can say. It seemed to. Its hard to say. I know he did tons of barrells for a custom gun shop, that made competion target rifles, and, they swore the cryoed barrells, were more accurate, and more consistent, when they heated up after many rounds. I noticed improved bore and piston skirt life, or, less wear. Like virtualy none. Cranks seemed to be harder after. I know I had him do some boring bar cutters, and some carbide porting tools, and, those ones stayed sharper longer, no doubt about that. He did it correctly, I know, and that makes a difference. The hard part, is knowing if they really did it or not.
Frank
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