There was a guy on another message board that was going to build a 45acp 18" barreled rifle. I am thinking why not go 460 rowland or 45winmag. It would be easy enough to do really. Find a doner action like a SA Remington or savage. Preferably a savage. Get a barrel and have it chambered in one of the two cartridges and have it cut to 18.5". Put a nice lower power scope like the Burris scout scope or the Weaver 1.5-6x24 Super Slam 30mm Rifle Scope . This would make for one hell of a short range brush gun for deer hunting or could make ground hog hunting VERY challenging.