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Old October 13, 2012, 10:01 PM   #11
Join Date: June 1, 2011
Posts: 34
870 and steel based shells

Sometimes the polishing of the chamber works. Sometimes it does not. I have six 870s. 3 have had the chambers recut by a gunsmith. One of the recut ones was a Wingmaster. All have had the AIPI steel wool treatment 4-5 times each.

About half of them still have problems with low base steel Federal shells. They all work perfect with brass Winchester AA shells.
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