Cause of stuck choke tubes and how to prevent

I don't know why the vast majority want to use tight chokes with steel shot when you get better patterns and greater distance with chokes more open than modified... and no barrel damage...
 
was your choke mod for lead or steel? A modified lead choke is full choke for steel because the steel cannot compress the way lead does, or at least that's the way I understand it...
 
Here is a copy of the CZ manual. Page 21 is interesting for this very issue:

http://cz-usa.com/hammer/wp-content/uploads/2014/04/CZ-USA_Shotguns_en.pdf

I've read this manual, but this is something I overlooked previously. I did not know that a choke tube can be considered modified for lead and improved modified for steel. This means that I would have been shooting through a choke not recommended for the ammo I was using (based on the chart on the box of shells). I'm pretty sure that this is the likely cause of the choke problem and not something like a defective choke.

Moral of the story - read the manual and read it closely!
 
Might be the threading on the choke tube, seeing as it doesn't fit into either barrel and other chokes thread in fine.


I don't know why the vast majority want to use tight chokes with steel shot when you get better patterns and greater distance with chokes more open than modified... and no barrel damage...

Because some of us have actually patterned the loads we use and not all guns or chokes are equal. My Beretta for instance patterns better with a mod than an IC choke with my steel waterfowl load.
 
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I use higher quality choke tubes, and use never seize when I install them. In my sporting clays/skeet guns, I remove the chokes, and clean and relube them about every 5000 rounds. In my hunting guns, I remove the chokes, and clean and relube them, at the end of every hunting season.
 
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