I went to the range and put 250 rounds thru my Nano. Up until this point the most i've shot at one time was 150 rounds. The double action only trigger pull can be quite the challenge once you hit close to 200 rounds. You're feeling that full 9lb pull (or whatever it is) with every shot! If you're not used to shooting a DAO pistol (like me) then you may find it difficult to shoot over 200 rounds in one session. I'm sure it will get easier the more i shoot.