My own Lyman (311313?) gas check jobs go 1800-1900 in the .30 Carbine and don't lead a bit. Don't know how hard they are, but it's close to the Oregon Trail bullets.
The gas check may be helping matters quite a bit, though. Our lubes have included Lyman (or RCBS?) rifle, and a 50/50 mix of that stuff and a band saw lube. Both work fine and the gun shoots 2 MOA.
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