Some may be out of spec
I purchased a 500 round box of Capital Cartridge 115gr FMJ a while back and just managed to get to it at the range. Some of the cases will jam in the chamber and jam the gun preventing cycling. I've ran other factory rounds through he barrel without issue and am not sure what the problem might be, but you may want to stick with a smaller box or two before committing to a larger order. Thought at first the powder charge was light on some but that doesn't seem to be the case. Out of about 100 rounds I had it happen 4 times.