ORIGINAL: fishdog52

I am pretty sure I shoot better groups in cold weather, not sure about my rifle. Due to such a long time required to get the barrel cooled down between groups, I don't do much accuracy shooting in hot weather. Further, I use a couple fairly intense calibers, and load them that way, have not had them lock up, but occasionally will notice signicanty flatter primers, cratering, etc. on hot day shoots.