While at the Tri-State, I managed to keep my ears open enough to hear some interesting things, one of which I’m probably going to try to see how it works out. One of the few wheelgun shooters at the match (a master class ESR shooter) was running a weird load in his 625: .45 GAP loads set to make the power factor required.
For those not familiar, .45 GAP was introduced as a “solution” for shooters looking for .45 ACP ballistics in a cartridge the same OAL as a .40 S&W. It has enjoyed moderate popularity, as at least one or two large PDs carry Glocks chambered in the gun, and there are also a couple micro defensive pistols chambered for it.
There are some benefits to running .45 GAP in a 625, or so I was told. The first benefit is that the Glock Automatic Pistol (GAP) round has a shorter overal length than the ACP round. Generally speaking, when loading from moonclips, shorter=better. The second benefit I had explained to me was the most interesting; .45 GAP uses small pistol primers instead of the large pistol primers employed by the ACP round. This has two positives: 1) you can actually find small pistol primers, 2) small pistol primers don’t require as forceful a hammer strike for reliable igniton, which means you can get an even lower trigger pull set up on the gun.
The real question though is whether the gain is really worth it. I’m skeptical of trying to create equipment solutions to questions of skill, especially when the ACP seems to work for pretty well for that Miculek guy.
That being said, I am going to pick up a box of 185 grain (my favorite bullet weight for ACP rounds) .45 GAP just to see what happens. That is of course barring someone saying in comments that it’ll vaporize my gun or something.