Best way to polish a shotgun chamber

[rbernie]

I have never done this, but what if you used a brake cylinder hone?

Its designed to smooth and polish brake cylinders, which about the diameter of a shotgun shell chamber.

I have no idea if it would work, so don't blame me if it fails miserably.

This is what I used on my 870 Express 12ga chambers, and (given some discretion about not removing too much material) it worked quite well. My 870 Express chambers were full of machining marks that 0000 steel wool didn't really address, and the brake hone was the best way to clean it up.

I cannot find a brake cylinder home that will work on the smaller 20ga chambers, and for those I use a 20ga 800-grit chamber hone that I bought from MidwayUSA. The 800-grit hone takes a lot longer to smooth out the chamber appropriately but it's a lot harder to remove too much material, either. They also make a 12ga 800-grit chamber hone if a brake cylinder hone is too aggressive for your tastes.

It is just not right that a pump gun should have problems with factory ammo.

I agree, but it's not entirely Remington's fault that the cheap Winchester ammo doesn't have bases that are sized to spec.... Also bear in mind that the promo (cheap) hulls in use today don't have brass bases - they use plated steel bases that simply do not behave as do the traditional brass-based hulls.