You didn't remove the bolt from the rifle during disassembly.
I also think that any sheet metal you can bend, your rifle's recoil can bend.
I'd like to see your zero, using the same ammunition, over a batch of 100 rounds. I bet it walks, and not due to heat, but due to the band shifting or bending after getting hot.
Last edited by azredhawk44; January 21, 2010 at 12:57 PM.