Both barrels were bulged at the base of the chokes. Since I mostly shoot slugs and RBs from my scatterguns I opted to over prune a bit at 20". This is an abused 12ga ML by pedersoli. I have tested fired it with .69" RBs, 0.02" patch and 60g goex ffg. Gonna try 50 yard groups next week. Gun is rated for 89g ffg and 1 & 1/4 oz of shot, but with the short barrels I think 60 to 70g ought to be enough.
The sights are attached with jb weld. If I like the way it shoots, I will properly attach the sights and have the barrels bead blasted and properly refinished.
BB