Ok I'm starting load development in my 22-243 now that I have all my other issues with it worked out. Anyways it seems lots of people use rl17 specifically with the 22-243. Now if I developed my loads when it was 70-80 and when I'm using this rifle the most the time it will be any were from below zero to in the 40s. Will this be an issue? Or should I look more to like h4831? I know a lot of people have had good luck with rl17 but don't know what there temperature swings are. Any advice would be great specially with you guys with experience with the 22-243 shooting 75g amazes.