I think I'm done with the mechanics now. The reaming of the breach really helped, and it's now transformed my 4" groups with JSB into 1/2" groups - clearly the softer JSBs were getting torn up during loading. Barry 8s and QYS still have the edge though. With a predicatable 2 stage trigger, accuracy is pretty damn good now, and I've slightly choked the port off so I have a marginally tighter power curve that runs from 10.9, to 11.5 and back down again. Job done.
I think it'll just shoot it from this point in
All that's left to do now is get onto that stock....
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.