Good report Cayugad. I envy you your shooting weather. Ninety-three degrees here and I just cancelled a week-end shoot. Just couldn't face it. Maybe next week end.
Anyway, I kind of enjoy working with a gun that doesn't want to behave. Never have found one that won't shoot something pretty well if you keep working at it, and it's sure satisfying when you hit on the right combination. Often, a JB treatment along with a touch of emery paper on the crown will aid things.
That darn 1:32 twist barrel ought to shoot something in sabots. I assume it doesn't have deep grooves, but fairly shallow ones designed for lead conicals. If you have any 350 or 405 grain 45-70 bullets, give them a try with Crush Rib sabots. Possibly even some of those cast Lee mold bullets that come out at around 420 grains from the "405" Lee mold.