put the power of a 44mag in your 1911. 460 Rowland Conversion Kits for your 1911 the link above will give you the info on this kit. 197 rnds of factory NEW 230 gr jhp ammo included. 100 rnds NEW brass. about 30 pcs once fired. I ran this kit in a SA GI 1911. I do not believe it will fit Colt "gold cup", or "enhanced" models. the guns they recommend are on Clark's website. $375 for everything. FTF in the Willamette valley area.