Well if it's any consolation, my Dremel DOES have a variable speed, and I haven't polished the feed ramp on any of my other guns
Just the gun that wouldn't feed... The other guns worked already so I didn't mess with them. I guess it's good that I left 'em alone. To be honest, I knew I was taking a risk modifying the feed ramp, but frankly I didn't really care. The gun was so cheap and I disliked it so much initially that I really wouldn't have cared if it had broken. Whether by luck or by skill, it works well and feeds reliably now
The Feg though, stock, would not feed and the gun would often just jam with the nose of the bullet jammed tight against the feed ramp. How would one fix this problem if not by changing the feed ramp? Anybody fixed this problem on a FEG PA-63, is there a better fix?
My Dad's Feg still has feeding problems with some ammo and I would like to know if there's a better fix, I have not done anything to his gun yet.
I should also mention that the gun in question (Feg PA-63) is not a locked-breech auto like the 1911 you are describing, it is a fixed-barrel blowback, so some of the pitfalls you describe may not apply to this gun and in my opinion, the geometry of the interaction between the bullet and feed ramp is FAR simpler to figure out, there's just less going on.
Don't tell my dad, because the gun was a gift from him, but I still don't like this gun very much, even though it feeds and shoots reliably now... Call me a wimp, but I'm a lot happier with my locked-breech guns and their nicer recoil impulse. The Feg is just downright painful to shoot, it's the only gun I own that I will not shoot without wearing gloves. It's even worse than my Kel-tec P-11 if you can believe it.