The thing I keep wondering when I look at cast spitzers is how would they work on animate targets? As most of you know, when the militaries of the world went to spire points in the 1906-1910 time frame, stopping power of standard military FMJ ammo took a leap up. They tumble. These cast pointy bullets ought to tumble, too. Sure, they are going slower, but the .300 Whisper was based on subsonic match .30 caliber 220-240 gr bullets tumbling. It was supposed to work and probably did (no personal experience).
I wish I lived where I could do some varmint blasting with some of these cast designs at 1500 fps. or faster.