From memory I'm recalling that back in the mid 70's while I was shooting with Fairchild AFB's security guys they used a load in their service pistols that was 3.5gr of Red Dot with a 158grn hollow based wad cutter. They showed me that if I wanted to make a real "manstopper" out of that load just reverse the loading of the bullet so that the hollow base is pointed out, sure looked wicked enough. It was a very accurate load in a 6" Colt Trooper.