Yes, I've used Oregon Trail bullets in 9mm, 30-30, 45colt, 45-70, 45acp, 357mag and 38spl.
I've seen some trace leading, but very minimal. As they say, usually there is no leading. Always easy to clean barrels.....and very satisfied with accuracy.
I once had a 444 marlin that didn't have ballard rifling. If yours has micro-groove rifling, you may be disappointed.
Get the laser cast loading manual.
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