Or the Hornady 250 grain FTX bullet at .452 diameter. Both are bullets I have used in my inline muzzloaders so reloading will supply me with BP bullets. Also the same powders I reload 357 and 44 mag are used for the 450. It made sense to go this route when I can mix shooting components. Hornady rates both these bullets up to 2200 FPS so they will work at 450 velocities.

The 458 Socom is another popular AR rifle round in Indiana. It uses the heavier .458 rifle bullets but is a short range rifle so it didn't seem a plus. That and cost is way more as a rifle and to shoot than I am comfortable with.