[cruiserman]

IMO 10mm is the way to go, and the G29 is a great combo of wonderful 10mm ballistics and size.

[45Auto]

The 10 mm is more than adequate "for the job". I notice that the "new" .45 GAP round is quite a bit shorter than the .45 ACP. The case is .150" shorter. I wonder how well it feeds and I wonder if the G 37 can be converted to .45 ACP. It looks, superficially at least, that it might be possible.