I took 10 apart and weighed the total powder and it averaged out as 6.43 gr for the whole 10. I even put the ACP cylinder in the BH and fired 10. Other than one normal round (5.4 gr) they all shot pretty much like a bit hotter 45 auto. No flat primers no ridiculous recoil...not even a pressure wave like you get from hot rounds. I think I will go ahead and shoot them at balloons back at the cliff behind the house. Not even any leading from the cast bullets. I still won't shoot them in my Wilson or one of the Kimbers either. I just bought another Kimber in 4 inch and I have to get some 45s out to break it in.....But not these.