It's interesting people keep mentioning +p for use in the Shield. Every test, report and review I have seen shows +p is not effective in shorter barreled guns. it does not result in higher velocity, as the powder lacks sufficient time to burn and or create higher pressure and the subsequent higher velocity/kinetic energy one would expect from a +P round. Am I missing something? I have spent time with both my Shields (9mm and .45) They have both eaten everything I fed them (rule #1 to find the best ammo for you- it works in your gun!) but the recoil and point of aim is diffferent between rounds I have tested. So I will continue to 1. research what "tests" the best through a variety of sources. 2. Limit my personal test to a few of the top rounds, to validate my gun will cycle them consistently. 3. Make sure point of aim matches an inexpensive, simiar FMJ round, for cost effective practice. 4. Buy, shoot and rotate my defensive rounds and practive ammo until I find something else that gives me a reason to evaluate a new round.