I just cut mine with a hacksaw, and smooth them off with a chainsaw file. Use cold bluing on the exposed metal.

Result?: Cylinder bore. Just right for a shotgun with a shorter barrel. My reason for doing this is cottontails and snowshoe rabbits in tight cover, but see no reason why it wouldn't work for home defense too.

Carry what you’re willing to fight with - Mackay Sagebrush

Perfect is the enemy of good enough