140 gr Nosler Accubond. 67.5 gr RL-22 with Winchester brass and Winch Primers - WLRM. Cases trimmed to 2.490. OAL (to lands) of 3.352" and bullets seated to ~3.338" +/- 0.002 gave5 shot groups of 0.581" at 3080 fps in my A-Bolt Eclipse with the BOSS set at 2.4.

I also worked up to 70 grains without pressure issues and found that 68.5 grains of RL-22 at the same specs as above gave 5 shot groups of 0.281" - same BOSS settings - at 3175fps. The cases actually shrank to ~2.482 with this load!? No stickiness with the bolt or other pressure signs, but it left me scratching my head.

I found the load and sweet spot for this A-bolt!

Have fun!