So I picked up a G44. 500 rounds through it and love it. I see where it seems to prefer 40gr round nose. I have put mainly Thunderbolts through it with great results despite what some are saying. I also put some Federal American Eagle through it and it amazes me to see/feel the difference between the two brands. American Eagle AE seems to def have a slower burning powder. Lots of smoke as well. I would have thought it would have been cleaner. Also ran some some mini mags and though they run well too, the Tbolts run just fine, not excessively dirty and less money. Such a fun little pistol..