kinky
It's been my experience that tubular extended mag springs in shotguns can get kinked a bit when installed, the result being "notchy' travel of the spring and maybe even the follower within the tube. A few disassembly and reinstall tries sometimes helps, maybe not.....worth a shot.
Also, some of the aftermarket follower plugs have stems that the mag spring can coil on as the spring compresses, supposedly aiding reliability. I'll add that some of these stemmed followers rob you of one round. Sometimes trimming that stem down in length a bit allows the extra round and still provides a guide for the the compressed spring.
The mag spring is the first thing I change out if I am experiencing feed problems in a pump.....unless there are other obvious issues.
good luck
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