Thanks for the discussion guys.

So.. it seems to me like the 450 NE is a more powerful cartridge than the 450/400 3"

I'm looking at 2 guns by 2 different sellers, one being advertised as the 450ne, and the other the 450/400 3"

Is one 'better' than the other from a shooting or finding ammo point of view.

For reference, in high power cartridges, I have bolt guns in 416 rigby and 458 lott. ( 375 H&H in a single ), and 9.3x74R and 470 NE in doubles.

Thanks for the discussion and information, please continue educating me.