870/Norinco HP9 failure to feed

supernova

CGN Ultra frequent flyer
GunNutz
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Location
Western Alberta
Hey guys, I got no response in B&G shotguns so Ill try here. Ive got a Norinco HP9 that doesnt feed a round from the mag after firing heavy shells. The spent hull ejects just find but a round does not feed. I have to close the action and reopen it to feed the next round. This happens with 1600fps 1 oz slugs or hotter loads. Light loads give me zero problems. The gun is less than a month old, had been cleaned and lightly oiled with Hoppes #9 w/T3. Action bars and shell stop are not worn and work correctly with light loads. Ive heard of this problem before but can never find a reason why it happens. Any help you can offer is appreciated..
 
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