I recently installed a semi fit apex 5" barrel on my m&p 9L
My go to load is a 145gr acme bullet 1.12 oal with no issues on my other 9s including the orig m&p barrel
The same load is tight in the apex 5" barrel and doesn't drop freely. tried to shoot 100 rounds and had 5 failure to eject and failure to go into battery. when I shorten the oal to 1.0 (which I don't want to do) it passes the plunk test
No issues with the plated 147gr xtreme at 1.12 -1.14 oal or factory rounds (blazer 115, winchester, freedom munitions)
I know this has to do with bullet shape but what bullet do you guys use in your apex 5" ?