Have the throat checked out. I have a 6.5-284 that has a rep as a barrel burner which is very close to the .264, but I have no desire to shoot over 600 yds and under 2950 fps with 140g bullets. It will go way over the 1200 rd predicted burn out. To put into context it like trying to get a 22-250 to perform like a 220 swift that goes 4000+fps, why?
Jim