Just in case anyone still looks at this thread and for the original poster a decade ago I’m running 59.5 grains of RL15 with WLR primers Hornady and Nosler brass and 250 grain Speer Hot Cors. No pressure issues at all. Tread carefully and at your own risk of course. My rifle is a tank. I have a SS Ruger M77 Hawkeye with a Shilen 23” 1:14 Super premium match grade barrel. I get excellent accuracy with perfect looking primers.
