[soundguy]

so if the 375 H&H is based on a 416 rigby.. why a different shell holder?

have not went out to dig up the burried ammo to look at the rims..

did they rebate a rim on one? or?

 

[soundguy]

well.. answered my own qurestion i guess.

just checked that new book i bought this week.. cartridges of the world 12th.. good info in it.

I see the rin thickness and width is reduced, among other things.