870P help

[King]

I just picked up a 870P on a police trade in. After pilfering through 20 shotguns, I found the one I liked but never dry fired it in the store. I get it home and... mushy trigger. I cycle the action, and again... mushy trigger, no break. Store is closed now so ill contact them in the morning, but does anyone have any suggestions to start troubleshooting this?

[Blowby]

Trigg3r job maybe?

[King]

Really? Blow me

[King]

I figured it out. I noticed that if the mag cap wasn't tightened all the way, then it would function fine. If tight, it would not. Then I realized the fore end tube nut was loose, causing the entire issue.

[BuffCyclist]

I figured it out. I noticed that if the mag cap wasn't tightened all the way, then it would function fine. If tight, it would not. Then I realized the fore end tube nut was loose, causing the entire issue.

Not that I'm an expert with 870's, but this seems like two completely unrelated issues to me. Why would a tube nut, which doesn't even touch or interact with the trigger, cause the trigger to feel mushy?

Are you sure it wasn't something rattling or sounding loose when you pulled the trigger (being the tube nut) and the trigger mushiness was only perceived to be mushy because of the rattle?





Trigg3r job maybe?
Really? Blow me

And I'm sorry, but this is freaking hilarious... it was actually the first though that I had. [ROFL1]

[Blowby]

I've done some work on my 870 and posted about it in the past. I'll see if I can find a link for you bud.

[Blowby]

I'm on my phone so limited. You can look up the original post but here is my contribution.


The chamber is usually under size and not surface finished properly. This is what I recommend if you are not comfortable being your own gun smith.


Polish the chamber with 0000 Steel wool and oil. Wrap it on a wood dowel attached to a drill. In and out, wipe clean and insert a "used" shell to drop out with gravity.
If you need to remove more than this a brake caliper hone (http://www.amazon.com/CTA-Tools-1120-Small-Cylinder/dp/B0035533GU/ref=sr_1_fkmr2_1?ie=UTF8&qid=1374764575&sr=8-1-fkmr2&keywords=small+Brake+Caliper+Hone) (link) with plenty of oil and a few back and forth passed, steel wool, check drop out w/ shell.



870 with loading and extracting issues. Blasted quite a few shells to heat the 870 up and have the issues show up. Be patient and when it's running smooth you will never give it up.



Action bar is not pushing shell release back enough at open stroke.
Found casting step under action bar on shell release side, filed, OK now.
Action bar nut was loose, blue loctite.
Deburr action bars
Adjusted action bars to slide smooth.
Polished chamber.
Removed metal from stock bolt that entered bolt chamber (Bolt hitting on open stroke).
Removed metal from sled hitting back of bolt chamber.
Found the hood lock edge not chamfered - fixed
Slide release area for trigger lock smoothed (Minimal removal for saftey)
Found that shell is recessed below barrel edge. Breech bolt hitting causing burr.
Checked recess for shell ring and removed overhang burr and broke sharp edge of undercut
Filed and stoned perpendicular to bore until shell is slightly above barrel edge .005".


Smooth as silk and instant pump/fire when needed.

[Coffee]

[King]

Not that I'm an expert with 870's, but this seems like two completely unrelated issues to me. Why would a tube nut, which doesn't even touch or interact with the trigger, cause the trigger to feel mushy?

Are you sure it wasn't something rattling or sounding loose when you pulled the trigger (being the tube nut) and the trigger mushiness was only perceived to be mushy because of the rattle?





And I'm sorry, but this is freaking hilarious... it was actually the first though that I had. [ROFL1]

Yeah it makes no sense to me either but one I figure out the mag cap being tight was causing the mushy trigger, I googled and found this:
http://www.brianenos.com/forums/index.php?showtopic=140004
Post #9 and 10

And yeah, my bad on the comment. I had a bad night at work and was a little irritated.

[King]

I'm on my phone so limited. You can look up the original post but here is my contribution.

Thanks, very imformative