Adjusting Gas Port Pressure

[x101airborne]

Hi all.
I have a KBI Charles Daly Field 3" and I have been using factory 3 inch buckshot out of it. Problem is..... I have started tearing the rims off the shells where the extractor grips the shell. Is there any way to adjust the gas port pressure? I know some are adjustable and some arent. I am going to pull the barrel and forearm off and take a look, I was just wondering if someone knew the best way to do it.

Thanks All.
Trey

[Red River Rick]

Dirty Chamber?

RRR

[x101airborne]

no, That was the first thing I checked.

[MBTcustom]

Does it do this with all shells, or just the buckshot? You're not running Federal brand buck shot by any chance are you? Tried several brands?
I was having similar problems with Federal shells at one time. Seems they would expand in the chamber and grip the walls. Very hard to extract.
I am not familiar with the gas port on a CD shotgun.
Can you post pictures?