Is there any truth to the rumors about Reloader powders being temperature sensitive? I recently worked up a load in my 243 AI and it is shooting really well. I just dont want it to go to crap when the weather starts cooling down. I would also like to see if anyone else has any good loads for this round. Right now, I have, 45 gr Reloader 22, 107 gr sierras, BR primers, right at 3200 fps.