Polishing a feed ramp & the throat, chamber & barrel hood tang, given the correct felt bob & polishing compound, will not alter the geometry.
Using a grinding stone is quite another story.
Unless there is something dramatically wrong with the feed ramp and/or the barrel fit to the ramp, which is fairly rare, there is never a need to change the geometry.
And then it should surely be done by someone knowledgeable in how the fit should be; lots of bubba's in the gun owners world though.
MM
MM, anybody stupid enough to take a grinding stone to a 1911 feed ramp shouldn't own a 1911.. or any other gun for that matter.
I do not profess to be a gunsmith by any stretch of the word. However, I do learn some neat tricks from those that do have the complete right to own that title.
