It was great shooting together today...a great way to spend a clear and pleasant winter day.
Did the 391 reliably cycle the 1,090 load in the past or has it been a consistent problem? If it's something new, you might want to use a small drill bit twirled between your fingers to make sure that gas port doesn't have any carbon buildup. On my son's 1187, I looked up the gas port diameters on the web, then used the proper drill to ream out the port. That helped immensely, allowing it to reliably cycle standard trap loads. I bought the shotgun used, and think it was "rode hard, put away wet" with the previous owner allowing carbon to build up in the port.
JoeR
If my 391 was jamming here and there on the skeet course, it was really jamming pretty bad on the sporting clays course. Just completely irritating. It would cycle a 1,235 fps 1 1/8 oz Remington Nitro load no problem but would not cycle a 1,090 fps 1 1/8 oz reload of mine. So, I sit here wondering if I should drill out the gas ports a little more to make sure they are clean, cut a coil or two off the brand new spring I put in the gun this summer, or just use it as an oar and get me a Beretta A400 Excel in 12 gauge or a Benelli Super Sport Performance Shop in 12 gauge. Nothing drives me crazier than when my gear does not work like it should. The damn gun was the only downer to shooting today.
Did the 391 reliably cycle the 1,090 load in the past or has it been a consistent problem? If it's something new, you might want to use a small drill bit twirled between your fingers to make sure that gas port doesn't have any carbon buildup. On my son's 1187, I looked up the gas port diameters on the web, then used the proper drill to ream out the port. That helped immensely, allowing it to reliably cycle standard trap loads. I bought the shotgun used, and think it was "rode hard, put away wet" with the previous owner allowing carbon to build up in the port.
JoeR