Originally Posted by T_O_M
I had one I bought used years ago. Didn't take much time to figure out why it was for sale, as the barrel heated, the groups would shift vertically up to about 8 MOA ... first shot hit point of aim, 2nd shot up 2 MOA, 3rd shot an additional 1.5 MOA, etc 'til it stopped getting hotter each shot. Any point where the barrel temp stabilized, it'd shoot real small groups, but when does that happen except at the range or on first shots? Eventually I traded it.

Tom


With today's stuff, all you'd need to compensate would be a stick-on thermometer for the barrel and turrets on the scope and you'd be good to go! wink


Sometimes, the air you 'let in'matters less than the air you 'let out'.