For my 26” 1 in 12” twist bolt gun: Hornady 50 gr SPSX, 26.0 gr Ramshot TAC, CCI-400 shoots under 1/2” for 5 shots from a solid rest at 100 yards. Chronographs just over 3200 FPS (the rifle is over 14 years old, but still accurate)
For AR’s Hornady 62 gr BTHP, 24.5 gr Ramshot TAC, CCI #41 or Rem 7 1/2, sub MOA, 2840 FPS out of 18” 1 in 7” twist, 3000 FPS out of 14” 1 in 8” twist barrel in warm weather. Loses about 100 FPS below freezing.
Still working on RMR 69 gr BTHP. Promising loads are 23.6 gr TAC along with 24.0 and 25.5 gr of Shooter’s World Precision Rifle, CCI #41 primers. TAC had best group of .70” at 2851 FPS, SWPR 24.0 gr posted .88” at 2732 FPS, followed by SWPR .93” at 2905 FPS. All loads used 24” barrel with 1 in 8” twist at 42 D F. Max loads would probably hit 3000 FPS above 7O D F.