I set up a "Tactical" 870 Express for a friend several years ago. Owning several older 870s and 31s and knowing how they work figured it was a bolt parts on job. Not so, Never saw such rough finish inside a gun. I had to polish almost everything. Add rough finish to cheap shells, not surprised it would not function .
Honing chambers or anything else it's important the lap be a close fit. Split dowel & paper not touching the sides won't have as much effect as close fitting turned wood plug & paper, which should be enough for a pumps chamber . Reason the brake hone worked was its fit. Finish lap usually lead cast to fit. .
Boats
