Oil makes shells stick in chamber?

My Grizzly had a burr right on the back edge if the chamber. It would catch my little fingernail. I lightly sanded that edge and polished the chamber. Chamber should be bone dry with no oil.
 
OK - So its either a burr, or the chamber needs a bit of a polish. Have a look at the base of a spent shell, look for scratches. Its relatively common for inexpensive shotguns to have rough chambers. This is easily resolved with some fine steel wool - see the various U-Tube vids on the subject.
As far as oil is concerned, I suspect that you got oil on the extractor surfaces that grip the shell. Couple that with a sticky chamber and you've got trouble.
 
If it's a detectable burr, just polish it off. If it seems the whole chamber is rough, string some super fine (0000) steel wool through the patch fob attachment of a section of shotgun cleaning rod, mount the rod to an electric drill and polish it that way. I'll throw in a caution to test for results so that you don't over-enlarge it, something I would think is unlikely. This is the usual recommendation for fixing 870 ejection problems, at least those that I've seen.
 
OK - So its either a burr, or the chamber needs a bit of a polish. Have a look at the base of a spent shell, look for scratches. Its relatively common for inexpensive shotguns to have rough chambers. This is easily resolved with some fine steel wool - see the various U-Tube vids on the subject.
As far as oil is concerned, I suspect that you got oil on the extractor surfaces that grip the shell. Couple that with a sticky chamber and you've got trouble.

What kind of oil are you using?
This time it was Hoppe's #9.

For storage i use an aerosol called ADS2000 its thicker and leaves a stronger film for protection. Also what i spray for being in the bush, but this time it was just Hoppe's.

No more ADS i think it might be the culprit.
 
OK - So its either a burr, or the chamber needs a bit of a polish. Have a look at the base of a spent shell, look for scratches. Its relatively common for inexpensive shotguns to have rough chambers. This is easily resolved with some fine steel wool - see the various U-Tube vids on the subject.
As far as oil is concerned, I suspect that you got oil on the extractor surfaces that grip the shell. Couple that with a sticky chamber and you've got trouble.

What kind of oil are you using?

If it's a detectable burr, just polish it off. If it seems the whole chamber is rough, string some super fine (0000) steel wool through the patch fob attachment of a section of shotgun cleaning rod, mount the rod to an electric drill and polish it that way. I'll throw in a caution to test for results so that you don't over-enlarge it, something I would think is unlikely. This is the usual recommendation for fixing 870 ejection problems, at least those that I've seen.

The small automotive honing stones could work to remove high spots
 
There should never be any oil in the chamber except when in storage. It can create unsafe pressure levels. Just wipe it out with a dry patch before using the gun. It's due to hydraulics and lack of compressability.
 
Might not be anything in the chamber ,the shells now use a mixture of alloys instead of brass,my trap gun will not spit out winchester super targets but everything else is fine.The tolerances (or lack of) in the chamber through the manufacturing process combined with the shell alloys can create headaches.Have seen it in Mossberg pump as well ,tore the shell rim off with the extractor, the new age.
 
is that rust in the extractor groove? post extractor and spring.

I think so, since I had this gun it basically spent 8 months outside exposed to the elements, with cleaning and lubricating at night.

I don't know what Krown has in it but it makes rusty metal blue, I might put it on for storage
 
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