Smoothing the action on Mav 88 (I have done it! or not?)

Have I succeeded in "smoothing the action"?

  • F*&^ yea

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  • Keep dreaming

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  • Who knows?

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  • QC you idjiot

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twofewscrews

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May 19, 2021
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Location
Rochester, NY
Hi,

A couple of caveats: Yes, I know this topic has been done to death. Yes I know the fastest way is too just shoot the f*&$#$. No, I have no intention of going near the internals with a dremel, maybe some fine sand paper but no changing angles or anything extreme. No there are no burrs in the chamber.
That should cover the usual crap.

As I was considering how the action functioned it dawned on me that perhaps there was drag/friction on/in the bolt, and between the bolt and the receiver/barrel. Going by the Mossberg schematics I am specifically referring to the bolt lock (part 7), the bolt (part 5), and the firing pin spring (part 56). The interaction between the receiver and bolt make sense, does the other part?

When I broke her down I noticed a wear on the top of the locking bolt and on right face of the locking bolt (from the perspective viewing gun butt to barrel). The wear on the top of the bolt lock appears to be from it running across the top of the receiver. It looked like lines running from front to back on the top of locking bolt that makes contact with the receiver.

I began manipulating the bolt lock using the bolt slide (part 8) and my fingers. Moving the bolt lock down/pulling the bolt slide back there was a crunchy sound/feel and the bolt would get stuck in the downward position 1 out of 5 times or so. I oiled it and continued to manipulate the bolt lock for roughly two hours. After two hours the bolt lock was only sticking in the downward position 1 in 10 times or so. I put her back together and I think I managed to "smooth the action" a little bit but it also might have been wishful thinking.

That was yesterday night. Tonight I got some fine grit sand paper (1200, 1500, 2000) and worked on smoothing the bolt lock. I very sparingly polished the top of the bolt lock to a smooth being careful to take as little off as possible. I also polished the front of face of the bolt lock which seemed to being making just a little too much contact with the bolt. The end result was the bolt lock was no longer locking up with the bolt.

I also bent the ejector a bit so that it didn't sit so hard against the bolt. I had to bend it a couple times to get the tension correct but eventually I found the sweet spot where i reduced tension applied to the bolt but not so much that it would fail to eject.

In feels smoother to me, but it will be a least a week before I can get someone who shot it before to confirm that I have in fact "smoothed the action."
So what say ye, have I successfully "smoothed the action" or did I just spend a couple hours rubbing and manipulating my shotgun when I could have spent a couple hours shooting it and produced the same results?
Or worse yet, is this simply a case of QC and now my shotgun is simply as smooth as it should be new and I have achieved nothing?
 
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