This powder was one of the most accurate i ever ran in my 223 ackley,temperature really effects it, worked up my chuck loads in 70 degree weather, wen't chuck hunting bin mid 80's weather and blew several primers so I stopped using it years ago, currently using 14 hrs. of bluedot and it works great,varying temps. don't seem to effect it, shot this load in 100 degree heat (600) rounds no problems lot's of dead p.d."s.
