Originally Posted by trooper357
I am not familiar with the ACP VS regular .45 caliber. Is it a shorter shell or shorter bullet?
.45 ACP (Automatic Colt Pistol) is an old, low-pressure round.
.45 ACP +P is a higher pressure variant that is safe in most Pistols (including Glocks) and either ups the velocity of a 5" Bbl. ~ 50 fps. (ft/sec.), or gives you ~ 5" Bbl. velocity out of a 4" Bbl.
So, while you watch this vid, know that you will get this bullet performance in a "+P" variety of this ammo out of the ~3-3/4" G36 Bbl. (and that is what I run in mine)
45 ACP Federal HST 230 gr Ammo Gel Test