I mentioned being interested in an autoloader with flatter trajectory, knowing that Kimber made their Classic model with target sights in 10mm. I roughly knew of the other options so I did some quick research by basically looking at the factory ballistics on buffalobore.com. I tried to make things even by comparing 180 to 185 grain bullets.

The ballistics put 400 Corbon at the bottom, 10mm above it, and 460 Rowland at the top. .45 Super was somewhere in the middle. Along with the research I started wondering if 460 Rowland wasn't too much for a 1911, although the compensator must help a lot, and I also found that kits are available for the large frame Glock 21. So it might depend on whether you have a spare 1911 or spare Glock 21.

This was the basic data that I found, for approximate comparison purposes:

10mm- 180 grain at 1350 fps
400 corbon- 165 grain at 1300 fps
45ACP +P- 185 grain at 1150 fps
45 super- 185 grain at 1300 fps
460 rowland- 185 grain at 1500 fps

and for comparison BB lists 44 mag 180 grain at 1500 fps