Anybody ever tried?
I have some machining background and am seriously considering modifying a TL358-158-2R into a 200-210 grain round nose for my .357 MAX. It looks like a .3125 Dia (5/16) Ball End Mill would work perfectly to open up the nose, and there is plenty of room to extend the length about .090 to .125. (Haven't calculated how much I would need to achieve the weight yet).
At $17.99 each, these moulds are cheap enough I can play around without feeling bad if I mess one up.
I'll let ya'll know what happens.
alan