I was out doing some final shooting yesterday before 1st rifle for elk opens this Saturday in CO. Maybe I was seeing things. I shot off upwards of 12 rounds in my .300WM and the barrel was pretty warm. No problem touching it but still pretty warm. When I went to check the target at 100yds. I had to adjust down and my next 3 shots were 2 MOA to the right. So I adjusted and shot 3 more rounds and was dead on at about 1/2-3/4 MOA. Cool beans, right? Well, I let the barrel cool down completely before the next 3 rounds and I was 2 MOA to the left.
Now, here's what my convoluted mind came up with. I had a 10knot or so right quartering head wind. When the barrel was warm and I went to check my target only the right side of the barrel saw direct wind. Would that right side cooled off enough to cause such deviation? Considering it was a right quartering head wind the shots, if affected by wind, would have had a left drift, not right. Does that make sense? Does to me... because when I let the barrel cool completely I was to the left the 2 MOA I had adjusted.
Oh, and if any of you read my questions about using PRVI ammo, well, I'll heading out with Federal Power Shoks on Saturday. Nice flat shooting bullet with lots of umph! I like 'em and my rifle seems to as well.