Following on from paul at barony's thread i was out shooting in the Aimpoint sight that i have mounted on my 870 remington. I use S&B slugs, now these slugs are of the Brenneke type. What you find is that they leave lead skid marks in the barrel. This leading is not easy to remove with a normal bronze brush so i have invested in a Lewis lead remover kit from Brownells, www.brownells.com Stock #516-102-001. I'm really impressed how effective this is on removing lead from the barrell.
The remington shoots slugs at 50 mtrs very well out of the 20" I/C choked barrel.
I will do a comparison between how the Remington with the slug barrel shoots compaired to the Combi and a normal O/U shotgun at a later date