Crimp groove is not required. I prefer plane base, gas check option will be good, but I don‘t need one.
HP-option is not a must-have.
Specifics of my mold:
1. Diameter .459,
2. over all length of the boolit 19,5mm / 0,767inch,
3. lenght of the ogive: end of the straight wall to the flat nose ends: 9,15mm / 0,360inch, the nose has a diameter of 7,40mm / 0,291inch,
4. as cast weight round about 295gr (WW).
Here are some pics of the boolit I cast with my custom mold (fyi: boolit is light tumble lubed):