.416 Weatherby Magnum

This ctg. and the Rigby are very close to being the same thing - aside from one having a belt and the other being a rimless ctg. Chambered in the same rifle, they are very close in ballistics, if loaded to the same pressures, ie: safe maximum working loads of the WTBY's standard = 65,000PSI.

The article was referring to factory ammo only - and in that, ballistically, the Rigby and .416Rem. are the same - and the .416 Taylor matches them.

http://kwk.us/pressures.html

In the kwk pressure data, three of these .416's have working maximums of 65,000psi. The "OLD" .416 Rigby is listed as 52,000psi by SAAMI and 47,000psi by CIP.

Given an appropriate action, there is 0 reason the .416 Rigby cannot be handloaded to the same 65,000psi - if "one" thought that was necessary.