I had to shoot this test three times because I couldnt get the damn thing to hold any kind of pattern..I started out with .375s, which I decided were to loose...I went to .380s...which were flyin everywhere...shot till I ran out of them....so I went to .375s and low and behold it did start to pattern at least...although not great....this and the 58 I did last both had two bad cylinders that threw rounds way out from the rest. Check it out.