Just brought the PM40 out yesterday with some 155 gr. practice ammo and the corresponding 155 gr. Double Tap. Kinda ferocious, which is nice, but seemed to really "pound" the gun.
I would think that lighter is "better" in a short barrel, but I'm a bit concerned over it's long-term impact on the gun. Is there a chance that maybe 180 gr. would be a better choice or probably just stick with 155? There's always 165 gr. too.