So, I picked up an 18" low profile XS sighted barrel. I temporarily put it on my glossy Wingmaster and it shot great. Excellent patterns with Rem low recoil 8 Pellet. I picked up a 1990s vintage Express recently and put together a proper social shotgun using this barrel and some spare parts. After running 2-300 rounds of mixed birdshot and buck through it I patterned it again and was disappointed.
I recently listened to P&S #126 and several members of the esteemed panel mentioned cleaning the plastic fouling put to restore patterns. I have no 12 gauge brushes, so now there are some in my Brownell's cart waiting on the next discount code.
How often do you clean your shotgun bore?