Remington 870 chambers

[expeditionx]

I read something different on another forum. Someone claimed the reason for occasional 870 failures to eject are caused by the extra tight chambers in the Remington 870 barrels combined with overheated chambers.
When I first got my 870 Marine Magnum a few years ago, I went out immediately and shot near 100 12 gauge shells in a relatively short period of time. I did have one shell that refused to eject from the chamber. I am not sure why it didnt. I do remember the shotgun was really hot.
I suppose someone with gunsmithing skills can verify whether newer 870 chambers are really tighter than other shotguns like Winchester 1300s or Mossbergs. If this is true, it would explain why others have had the same kind of failure to eject happen on newer 870s.

 

[Dfariswheel]

No, Remington chambers are not tighter than other makes.

In most cases, failures to eject are due to fouled chambers.
People often fail to really scrub out shotgun chambers, and built up powder and plastic fouling cause the shells to stick.
Many heavy-duty shotgun shooters buy special shotgun chamber cleaning brushes that are made specifically to clean this build up out.

The second most common cause is cheap ammo.
Some guns just don't "like" some cheaper ammo and choke on it.

An occasional problem concerns the Express guns.
These are Remington's "budget" model, and the bores and chambers aren't as well polished as the more expensive Wingmaster and Police guns are.
A few guns have turned up from the factory with a tiny burr in the mouth of the chamber, or a rough chamber that can cause the shell to stick in the chamber.