mossberg #### itself after firing slugs

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it is normal for a shotgun (mossberg 590 in my case) to #### back after firing an heavy slugs? i was shooting some 1 1/4 oz 3" slugs the other day . branch rest , shooting for 100 meters . the action cocks back on is own on several occasions. but it didnt happen when i shot the same slugs while standing up. the gun is low mileage. i've probably put les than 50 slugs down the pipe and 300 target loads or less with it since new.
 
My Winchester m120 will open itself if I do not hold the slide if it's relatively clean with normal bird/trap shot rounds. I always thought it was normal. If I am holding the pump, it may make it faster to reload.
 
Is it doing somethimg like this? http://www.youtube.com/watch?v=mFJTw1Xl-UI

Never seen anything like that before.
I know winchester 1300 have something like that,recoil slide assist.

yeah it open up like that. i guess the recoil is too much for the locking mechanism while branch rested. first time shooting it that way and it just felt like getting hit by a train. stand up shots are easier on the gun as my body absorb the recoil better.
 
I have that happen with my 870 with 3" loads sometimes and believe it is my death grip on the pump. When the shot is fired I'm pulling it back ejecting the round I'm thinking. I noticed that with my 3" Winchester turkey loads which are 1400 feet per second.
 
Heres what I determeind with some research. The action lock unlock after fireing to facilitate faster pumping (having to hit the release isnt practical). The recoil knocks it back. That is why you dont notice on light loads (the light recoil). It happens with both manufactures.


From Remingtons website-
The action on my Model 870 opens when I fire it. Is this normal?

Question
The action on my Model 870 opens when I fire it. Is this normal?

Answer
It is the design of the Model 870 for the action bar lock to disengage once the shell has been fired. This enables you to load and fire the second shot with more speed.

If you have any concerns regarding the safe operation of your firearm, you can take it to your closest Remington Authorized Repair Center for evaluation.

From Mossbergs

NOTE: During firing, the action unlocks automatically after the hammer falls and
the action can be cycled without depressing the action lock lever.
 
its the gun, not you "guys" pulling back... i prove it by one hand shooting 3" magnum slugs from my moss 500's... ,it throws the foregrip back ejecting the cartridge.
 
IF your shotgun is functioning properly you shouldn't need the action release to operate the action after firing... The action cycling itself(well half cycling itself) is perfectly normal if you don't support the fore-end/pump.

I thought this was common sense??

TDC
 
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