The problem with 7.62 Tok in a 1911 is the overall cartridge length. You either load 5-6 rounds slightly cockeyed in the magazine (yet they surprisingly work), or you have to run each round through your loading press and push the bullets deeper to get them into the magazine.
Considering what it cost to do a 1911 conversion, for a little more, you could pick up a Tokarev pistol and shoot 7.62 with no effort at all.
