With full discloser, I shoot moly plated bullets, so most likely you won't be able to run as much with bare bullets, so.....
In a 24" Rock barrel, I went to 42 grains of Varget and R-15 with either 162 Amax or 168 VLD's in the lands. Give or take 2700 fps.
I had a factory 700 Varmint with a 24" heavy barrel, that I shot strictly 162 Amax in, but can't find my notes, pretty sure I was using R-15.
Edit....found the old post on the varmint gun. Too bad the pics are gone, as Imageshack pulled the same shlt as Photobucket did.
https://www.24hourcampfire.com/ubbt...-08/Search/true/7-08-nirvana#Post7629839
