DO NOT USE HOLLOW POINT AMMO IN A SUBGUN WHILE IN FULL AUTO MODE!!!
It's not a matter of if but when. The odds of cycling a hollow point round and hanging up mid way down your 10" barrel and running another directly behind it are greatly against you. Regardless, if this happens, sending one or more rounds up the barrel will cause it to bulge. You will then have to cut the barrel this side of that bulge to remove and shroud and or barrel lug. Parts are scarce and barrels are becoming pricy.
A WORD TO THE WISE.