I am with the guys on the bullets, 70gr Sierra BTHP for match shooting or varmint, and the 85BTHP Gamekings for big varmints or deer. I use IMR-3031 instead, not temp. sensitive, seems to be the right burn rate. In handloader mag awhile back, they were using my exact same load I had worked up 20 years ago for the 85gr bullet, quoted it as the ultimate .243 deer load, Brian Pearce I beleieve. Pm me for load details if interested.