Hardball is the most reliable 45ACP bullets available. It feeds and chambers best.
As for effective performance, as a fight stopper, shooting a 1/2 inch hole in your target is very effective.
If it's too mundane, get the hollow point you like and shoot a lot of them to make sure that round will feed every time.
Definitely this, as mentioned in another thread, you don't want to find out your gun doesn't deal with x brand of ammo in the middle of a gun fight.