Awesome. However my favourite handgun will always be the Colt 6520 / N80 / N99 10mm Pistol! Even at level 35, I carried my Weathered 10mm Pistol with me everywhere!

In real life, I love the 10x25mm AUTO cartridge and my Glock 20 that fires it. A superb round that rivals the .45 ACP. Perhaps not as heavy as a round, but almost as straight of a trajectory like the little 9x19mm. But I must say that it's almost all because of Aliens and Fallout that I became so aware of a 10mm caliber cartridge and love it so. I can get 10 rd or 15 round magazines for it.
I also had a Kimber 1911 .45 once with a 10 round double-stacked
magazine (it's not called a clip, people). I think it was even possible to get a 13 or 15 rd mag for it. I'm hoping the .45 will have a similar sized mag. Likely because it's considered such a large caliber (11.4mm), it would carry less rounds than all the other automatics except for the Sig-Sauer 12.7mm Pistol, which it should have at least a couple more bullets than. Plus it should do a little bit more damage but have a slightly slower rate of fire to the 10mm. Really the differences should be marginal and merely up to preference.