Agreed, but you could make the exact same statement about .40S&W.
Originally Posted by rachilders
As I understand it, the major problem with running .45ACP in small pistols (3" 1911s, mainly) is related to dwell time and possibly barrel angle as the slide cycles. This could presumably be fixed in a modern design, rather than just chopping down an old one. Glock's short .45ACPs run well, for example.
On the other hand, the .45 ACP was designed to operate in the full size 1911 pistol using 1900 era powders and loads, which is why the .45 ACP has almost always proved to be a problem in small pistols.
I don't think pressure is the issue so much as the physical dimensions of the cartridge. The GAP is just wider than either of the other cartridges, obviously. The slide might have to widened considerably, as Glock did. If so, it would somewhat defeat the purpose of making a small pistol.
The current crop of 9mm compacts are designed to shoot high pressure loads, like the 9mm and the 40 S&W, so they should have no problem handling the .45 GAP which was ALSO designed to use the same frames as current 9mm/40 S&W's.
If you're utterly convinced that the .45GAP is that much better than the .40S&W (and we're talking a 1.35mm difference in diameter), you might be willing to put up with a "beefed up" gun in order to use it, so your idea is probably workable if the engineering was successful.
From the start, the .45 GAP was designed to give .45 ACP performance in a smaller, more managable package. My suggestion is that for someone who wants the stopping power of a .45 in an easy to conceal gun without the problems often associated with the .45 ACP and small framed pistols, the GAP would seem to be a good alternative.
But we already have .40S&W pocket guns that work very well, and there is precious little evidence that .45GAP is superior to .40S&W in terms of "stopping power." So you'd basically have a bulkier gun that MIGHT be marginally more effective, in a caliber that is more expensive to shoot, harder to find, and has a far more limited ammo selection. I don't know how many of those you'd sell.
I'm not an engineer, so I don't know how hard or easy it would be to make those guns work with the wider GAP round. I do note that the Kahr PM40 is readily available and works well. I assume Skyy and KelTec could make something that retails for considerably less than the PM40, so that would be a good selling point. I think either gun would be far more successful in .40S&W rather than .45GAP, however, for the reasons stated above.
I mentioned the CPX (SKYY) and P-11/PF-9 specifically because they already have a basic size and design I would would consider workable. Rather than start from scratch, it would be much simpler to beef up the SKYY/K-T to handle the load.