Ran all major brands of ammo thru sp 01, from 115 to 147 and never had any issue, when I started reloading I was warned not to use the standard go / no go gauge as it would allow for the OAL to be to long, and that turned out to be true, my OAL on my reloads is 1.10, with a flat nosed 147 Ploy Coated Lead bullet....accuracy has been excellent....as for a general comment on the my CZ SP01, unstoppable! I shoot a lot of competition and it amazes me to watch guns costing twice as much have major problems, as for the accuracy...I can not out shoot it. Good Luck.