I've got an 11-87 Police model, originally came with an 18" barrel. I've since put a 26" barrel on it. I also put on a scattergun sidesaddle, big charging handle, +5 tube, and a dmw easyloader.
Ever putting that stuff on there, it's been short cycling. It will run about 80-90% of the time, but will occasionally stovepipe or close the bolt without feeding the next round. It also will never lock open after the last shot. It does this with every ammo I've tried (a variety of #8 and #7 1/2 shot, full house slugs, and magnum 00. Oddly, the 00 was the worst.)
At this point, I'm fairly certain (though not 100%) that it's the gas system. My reasoning is this: The original 18" bbl does not have the gas cylinder spring / pressure regluator thingy. It apparently uses all the gas for cycling the action, like an 1100 would. The newer 26" bbl has the spring. I'm thinking that it's venting off the "excess" gas, and as a result not enough is going into cycling the action.
So, does anyone have any suggestions for fixing this? I've considered disabling the pressure regulator system (though all my ideas for doing so are kinda permanent, which would suck if that wasn't the problem). Anyone have any better ideas?
Thanks in advance.