One other question to you Semi - Did you try shooting the .452" bullets? It may be the additional .001" may be just a tiny bit tighter and may engage the rifling better. They will possibly be a little bit harder to start but once the rifling is cut, they should go down pretty easily.
I haven't shot any of the resized bullets yet, and forgot to try to load one of the pure lead .452s in the bore before I sized them all to .451. But I do have some hard cast (wheel weight) ones sized to .452 and
can not force them into the bore of the .451 LRH barrel. You may be able to force a pure lead .452 into the bore, but I suspect it wouldn't be a lot of fun. The next time I cast some up I'll save a few of the .452 size and give them a try.
Looking forward to your range report on those bullets
Bronko. How do those bullets fit the bore of your LRH -snug / loose?I'll be shooting some this week-end.