I was just using water jugs and 9mm 115gr hp PPU. I know water-jugs won't show the plugging like the FBI testing you do, so maybe my idea of a successful bullet wouldn't actually work in "real" life
the PPU 9mm is the one in the middle
the only other 9mm in the pic is the hornaday 90gr on the bottom, the rest are 38/357
I would happily trade $1.25 per cartridge to determine where my carry gun shoots and then enough for two or so clips. Since I do not shoot people often I think that a few extra dollars is worth having great ammo in the gun. If I an not close, I am not going to need to shoot anyway and will save another $1.25.