Some years ago I bought a Savage Bolt Action in 223. The rifle was extremely accurate but had a wondering zero. It had an injected molded stock and while it was not affected by moisture, it sure was by changes in temperature. At the time I had other things on my agenda and I sold it. I have been thinking about it and wonder if I could have done something to save it: it was after all a tack driver.
beagle 6