dan,

I've only used one of those buttstock bands on single-shots. Once in particular was a few years ago in Botswana, where my primary rifle was a Ruger No. 1 .375 H&H. Had the band filled with three different 300-grain loads: solids, easy-opening soft-noses for plain game, and Fail Safes for buffalo. It made using the right load for the situation easy.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck