I'm shooting a .260AI but you should get sim. results. The 85gr Sierra or 90gr Speer over VV150, RL15 or IMR4064 will push 3400fps & in my rifle shoots @ or under 1/2moa regularly. The 120gr bullets make a nice deer/antelope load. Try H4350, IMR4831 & RL19. For the 140gr bullets, I like H4831sc & IMR7828. I can get into the 2850fps range shooting right @ 1/2moa. A nice cartridge, I may get a M700Mtn. in .260 for a light rifle.

43. 5 grains of IMR 4064 with a 100 grain bullet ( Nosler BT or Partition, Hornady 100 SP or Sierra 100 grain HP)

Velocity is 3350 at the Muzzle in a Ruger 260 with a 22 inch barrel.

Accuracy, can cover a 3 shot group at 50 yds with a dime and at 100 yds, 3 shot groups can be covered with a quarter.
If the shooter is doing his part.

Scope is a stock Leupold 3 x 9 Vari X 2.

Cheers and good shooting
seafire