I am just a few weeks away from taking possession of a custom built .20 cal wildcat. The parent cartridge is the .22-250. I have taken the parent cartridge and "Ackleyized" as well as moving the shoulder up about 0.045". I also recently acquired a 20X47 Lapua so it will be interesting to see how much help the extra powder is. Since this is a new cartridge I have come up with a few names for it and wanted to get a vote on the names:
1. The .20 Hood Magnum (named after myself of course)
2. The .20 Rapture (bringing The Rapture to Predators everywhere)
3. The .20 Chupacabra (Mythical Mexican hairless dog)
Once I get the rifle back I will report back. I researched others peoples experience with hot .20 cals and bullets seem to be the main issue. I ordered some custom Don Unsmuig bullets that others had reported favorable with so hopefully that problem is already solved. I hope for +/- 4,500 fps and well over 400 yards of maximum point blank range with 38-40g bullets.