It looks like Winchester will be introducing a new cartridge designed around those states that require a straight walled cartridge for deer hunting. The .400 Legend.

The choice of caliber - .40, seems strange, as .40 cal rifle bullets are not often found, with most .40 projectiles designed for pistol cartridges, at about 1000 fps less velocity than the new cartridge offers. Maybe suitable bullets will also be offered to reloaders?

https://saami.org/wp-content/uploads...2023-01-30.pdf

Larry