I tried a few hundred the old fashioned way. I pulled what little hair I had left out.
Thats why I have the set up to make them like I do now. In fact, I originally wanted to build a 302 Whisper, but I couldnt find any decent reloading data for it and JD Jones was not willing to sell me any. And thats how my little venture into the 300 Whisper/Blackout began.