You say it's shaving lead, and I don't doubt your word -- but different folks mean different things when they say that. A buddy once told me his Model 28 was shaving lead, and showed me what he was talking about. IN his case, it was nothing more than the usual accumulation of lead/lube you can expect to find around a forcing cone after shooting a lot of high-pressure cast loads.
But assuming yours is actually spitting lead, you really need a revolver smith to diagnose exactly what's needed. I've tinkered with revolvers and done a lot of parts-swapping in my time, but a serious timing problem is one i'll leave to a pro.
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Pisgah
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