Re: Opinions wanted on a new wildcat idea, please offer opinion...
The 408case would not be a good choice for a mauser action, unless it has 1.125 or bigger thread tennon. The 505 gibbs case is different and uses a much lower chamber pressure. To be safe the 408 should have 1.125 or bigger thread tennon for the barrel, my actions use 1 3/16" x 16 tpi for safety. Right now there are only several actions suitible for the 408 based cartridges.
As to the 416 barret case, its a shortened 50cal BMG case, the case looks to be around 3" long, necked to .416 dia bullets using a special lathe turned bullet. This will require a BMG type action.
Kirbys 50cal on the C-T case will or would make a great dangerous game round as well, can you imagine a double rifle with that cartridge.
I am working on a short BMG case necked down to .408 cal, but check my website for details, i dont want to hi-jack Kirbys posts.
Have a good one!