Well, if I had of started here I may have saved some time. Playing with a .430 based on the 400 Whelen case from Quality Cartridge. The QQ 400 Whelen is blown out straight. .473 from rim to mouth. The .430 Hornady 265 gr FTX drops right in the case. We ran it through a 444 Marlin die and it fits nice. While playing, I saw a box of 225 grain Hornady .451's, for my friends Bushmaster on the shelf. They fit the QQ 400 Whelen case perfect. So, may shift gears and try the .451.

Back to our first attempt at the .430 version, we trimmed the case to 2.25" and seated the 265 grain FTX to the canalure. It fit's our Savage 99 C magazine perfect. Snapped it into a 99C and the bolt pics the cartridge up and pushes it forward smooth as silk, lined up dead on the bore. Any suggestions? We are about to punch a hole in a piece of steel and call it our test barrel.
[Linked Image from i.imgur.com]

Last edited by JoeMartin; 09/07/21.
I'm not greedy, I just want one of each.

Remember Ira Hayes

JoeMartin