LOL I was considering making a wildcat
But Winchester is doing it for me
As the 400 Legend has the same head size as the 7.62 x 39
The 400 Legend case is 1.65" and OAL of the loaded round is 2.125
I saw 40,000 as the pressure
So a touch shorter than a 223 round
A new AR15 deer round for states like Ohio that mandate straight walled rifle rounds
LOL Also bet there will be a few new .40 cal molds designed for this round
John