Maybe you can tell me something- is the 1760SE barrel the one w/a flat at 12 O'clock that starts about 6.25” forward of breech?
Just noticed that you did an edit after I copied your quote, but it's all the same thing. 6.25 or 17", take your pick, haha.Stinger
My guess : SE - Special Edition.
Considering their affinity for ruining the rifling at the muzzle, my guess is Scarred Exit.