I have the Commander sized Nightmare Carry with rounded butt, not quite the full size you want, but I can say that after a little polishing on the fire controls, esp the firing pin block pin, to get rid of a really skritchy trigger, it has been a delight to shoot. I've fired everything from 185 gr target semi-wadcutters to hot SD 185's to reloads, to factory SD and hardball 230's, and have not had a single failure to function in about 800 rds. I haven't done any bench accuracy work, but at 3 to 25 yds, it hits what I aim at as well as I can.