Well, from my point of view, it's either a long range bipod hunter or fun gun for the bench, right?
I would just keep cleaning it myself, or on a whim and not being worried about wreacking the barrel, buy a Tubb's fire lapping kit and see what's up!
Sounds like a great candidate for a fire lapping project for two reasons.
It's an older barrel, and it fouls!
How can you tell that OI know NUTNIN' about fire lapping??!!
Cat