Thank you! I gave away my last Big Book just before I became curious about this gun. I think mine pre-dates the “Sweet Sixteen”, and with the vented rib, it’s been hard for me to identify. I haven’t spotted one on gunbroker yet, in my sporadic searching of completed auctions.
From my reading, I think this gun started life as a 2 9/16” gun, and was modified. I think I read somewhere that that ring of bright metal barrel extension indicates it was properly modified to fire 2 3/4”. I wasn’t sure though, which is why I had the chamber throat opened up before firing.
I’ve only tried the rings in the “heavy load” configuration. I also just replaced the steel gas ring parts, but I’m still using the original fluted bronze bushing. The new action springs seemed quite a bit longer and beefier, so I’m hoping that’s all it needed to be more reliable. Fingers crossed.
I’ve always been on the fence about this gun, so if it doesn’t smooth out this next time out, I may just move it on. I feel like it deserves better than I can give it. It really needs a new stock set, and I don’t see myself shooting trap with it regularly.