Some time back, my job required carrying large sums of cash. I had talked with our sheriff, and got a carry/conceil permit. I had purchased an American Arms derringer 45-410. With 255 gr. factory loads, recoil was punishing. And accuracy was poor, at ranges beyond spitting distance. I thought I could cure the that problem, by stuffing 5-00buck in a 410 3". It worked, 4" group at 10 feet, but penetration test were poor. I am currently waiting for some Sellier/Belliot 410 2 1/2" 3-000buck, to test. If they don't perform the way I want them to, I'll settle for 225 factory stuff, to reduce recoil. There is "food fo thought" in the earlier post. I can see, where civil court could pose problems in a legal defense shooting. I was told by several authorities though, if you have to shoot, make sure you take a killing shot. which makes me wonder about the derringer at anything over hand shaking distance. Thank God I live in an area, where the need is slim, but I still believe in being prepared. As if everyone were, there would be alot less assulting type crimes. O.