Ya I've seen 2 different 870's at my range that had to have the chambers polished because of rough machineing in the area of the chamber that the brass would normally occupy.
Seems there are just enough burrs and scratches from starting the chamber reamer to cause low brass/steel econno ammo to hang up.
I actually helped the one guy clear his jams and found that once the gun was disassembled the cases just came out with my fingers, but the scratches/burrs were causing it to get snagged once the shell had fire formed around them and the action was used to eject.
In both cases a little polishing of the area reminded the situation.....or you could iron the rough spots out with a few hi brass hi impact 3+ dram loads.
I used elbow grease, 400 grit sand paper, a shot of graphite spray and never had any issues.
The other two guns belonged to people less confident in their own skills so payed a mere $20 to a local smith to do the work which was a 1 day turn around and probably only a few minutes actual labour.
Sadly a Reminton warranty is in the neighborhood of 3-6 month turnaround, which is why I elected to void my useless warranty by doing my own work.
