I have a FX impact X mkII .30 caliber 700mm with power plenum looking for good settings like reg and HS for 44.75 grain JSB pellets out to 100 yards. Thanks!
Anywhere between 920 and 1020 FPS they do real good in my testing with a slug A liner. In addition, I do have the slug power kit plus a modified dual transfer port and probe, so my settings would not help you, but you should be able to easily reach 920 on 140-150 bar.
