.45 GAP operates at higher pressures than standard .45 ACP.
.45 GAP and .45 ACP +P have similar pressure ratings.
.45 GAP will allow smaller, thinner grips.
I went with the .45 ACP, because I can shoot .45 ACP, .45 GAP,
.45 ACP +P and .45 Super all in the same gun. I've done this
with my...