I made my loads for my 243 AI, 260 AI and 375 RUM in the summer. I have all my loads with two bullets each worked up to what I want. Its cold here in Michigan now, are my loads okay or do I need to rework them?
Depends on if you're going to use the guns in the cold.
A hot load is different than the same cold. And same applies to the barrel, bedding, stock, firing pin strike, mounts, and recoil pad(basically everything else).