Originally Posted By: Jack RobertsOriginally Posted By: tractormanLiterally putting them on ice in a cooler. Ambient temps effect loads. Someone can probably explain this better than me as I am still learning. There was some extensive testing done a few years ago. The, by far, biggest factor was the temp of the barrel. The powder temp was a minor factor compared to barrel temp. You could probably find the Precision Shooting article online by searching.
Jack
Of it sits in the chamber, yes. But a cool round, directly into the rifle, then shot, it DOES make a differance. You could take a ice cold round and put it in a hot chamber, let it sit, and the heat will win. Jme.