Without looking at any load data, I'd guess that any action would be fine, that it's probably the same amount of powder as the 1550 FPS ammo and that it's only faster because it's a 50% lighter bulletWell, my plan was for a short barrel, get off me gun. So these might fit the bill. Need to blast a test target- dillo- and see. Just leary of shooting them out of a semi auto, don't want to bang up the action.