Forgive me if this question seems stupid but I'll ask anyways :-)
Im a machinist and have access to all kinds of CNC Lathes and regular CNC Is it possible based on the hardcast lead properties tor use an end mill to make a slight hollow point out of a Hardcast bullet for my 500 S&W, Best of both worlds if could get some expansion and deep penetration without blowing up, could experiment and use a 90 degree 1/4 drill mill of varying sizes 3/16,1/8 etc.of varying depths. Thanks

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And the purpose in doing that is....? Just what is it you are planning to shoot?