I have a S&W equalizer in 9MM. The only issued I encountered is it doesn't like SIG V Crown JHP ammo. It will fire a magazine full of them but the last one, sometimes the last two rounds will not feed into the chamber. I tried this ammo with all the mags it came with, and yes, the gun was clean and properly oiled and got the same result. Other brands of JHP I tried work great. Only the SIG V crown JHP that gives me problems. It's not a big deal because there are plenty of other JHP(s) to choose from. However I'm curious if any one else has this problem. Also note that this gun is well beyond it's "breaking in " period.