If you're hung up on getting exactly 210 grains, all you have to do is adjust the alloy content when casting 314299. Throw in a bit less tin/antimony or add some pig lead and you can get 210 pretty easily. Of course you might find it shoots better cast harder/lighter, but that depends on your load and your barrel.

FWIW, the original bullet was nominally 215 grains, not 210.
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