AH,

While I do not have one, I am familiar with the cartridge from the AR15 world.

The one thing I think I would want to research if the plan is to hunt with it would be available bullets. The cartridge has been a little slow getting suitable projectiles for the AR15 world, and with the decreased velocity with a handgun, you might have slimmer pickin's than you might have with the more traditional bore diameters. And I would think it would need every bit of a 14-15 inch barrel.

Craig