I owned a 31 in 16 G. Constant fail to feed, finally figured it out, Cheddite hulls, weak rim bent on extraction. Quality hull never failed.
However repeaters that have close tolerances often have trouble with feeding. Rattling 1911 rarely fails, tight target 1911 is fussy. My 31 compared to 870’s & model 12s was much smoother and tighter. 870 loosest of the three never fails to feed.
William
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