I only polish feed ramps on guns with roughly finished feed ramps. I never use power tools like the dremel.

I use fairly soft, die makers stones and draw polish in the direction the bullet feeds. This cuts across the machine tool marks from cutting the ramp and eliminates the roughness with minimal metal removal.


Using a rotary tool may make the surface brighter but doesn't as effectively eliminate the roughness or waviness of the surface. Might get similar results using fine sandpaper wrapped around a properly sized wooden dowel. You draw polish with strokes in the same direction the bullet feeds/case extracts. Not in a rotary or circular motion. That only hides the roughness not eliminates it.

I also never polish to a bright finish. Just use a 320 grit stone and remove the tool marks or roughness. I've never made a problem worse using this approach.