I use H1000 with my favorite load of 160 grain TSX.

The topic of temperature sensitivity has been raised again in this thread. What brands of powder or specific powders are considered to be the best with regards to temperature sensitivity? Which are the worst? Are the changes so great that they would significantly alter the performance of hunting ammunition that would be used in temperatures ranging from about 10F to 90F? Would a cold round put into a hot chamber heat up enough in a minute or two to affect the performance of the ammo? I have never worried much about the temperature affecting ammo and am wondering whether I should start.

Last edited by Notropis; 07/01/10.