I am going to be "odd man out" here {there's a fn' surprise!!} and say a few things different...first off, if the gun will not feed and the rounds are sticking hard on the ramp then polishing it to a mirror is very likely not going to be the answer. You may ultimately want/end up with it that way to make you feel better because so many have conveyed that it is so necessary, but at the end of the day it is extremely very doubtful it will prove the sole answer to the problem. Just like first shooting a given number of rounds thru it to "break it in".....if the gun wont feed no amount of rounds fired are going to change or alter it enough so it does.
Second, does this jam happen when you first rack the slide to load the gun, or does it happen when the gun is being fired?? If it is happening such that you cannot load the gun initially then I suggest you find someone with a working, functioning 1911 that has proven to feed the bullets you want to use and copy the shape of the breech. If you can find a Kimber that would probably be ideal. As above, they are very reliable and will feed everything you want to ever shoot. Short of that, I suggest you take it to a known good smith that knows what he is doing.
Kimber, McCormick, Wilson and Mec-Gar all make excellent magazines. Many gunsmiths will take on this job, but you need to make sure you get one that knows what he is doing because ramping out a barrel until it "works" could leave you with a dangerously unsupported case to the point it will rupture and blow. A circus chimp can grind on it until it feeds, but getting it to feed and not blow up on you might take a good smith.