I've worked for many years with every small-arm caliber the Navy uses, and I see no need to switch out from the 9mm. The Armed Forces uses a +P load for the 124gr round, and this packs quite a bit of punch, even with the need to use FMJ bullets it has over 400 ft.-lbs. of energy at the muzzle. Should we use HP?? Of course!!! The fact we "regulate" the damage done to enemy combatants never made sense to me. But switch out from the 9mm?? Not really necessary or needed, the 9mm is a good, cheap, versatile round and, despite what some may say, does indeed pack a good punch.