Haven't the 87 grain bullets across the board been constructed heavier than what we have long considered to be "varmint" bullets? I can't state that to be a fact from empirical observations, but it's what I've been led to believe. If so, I would surmise that 87's in .257 Roberts' were put there for the purpose of capitalizing on the .257's higher velocity with attendant higher performance on tissue and bone. Kind of akin to employing 55 grain TSX's in both a .223 and a .22-250 - they'll serve admirably on deer in both applications (but I'll also surmise that the wound channel will be more impressive from when fired out of a .22-250).
Last edited by gnoahhh; 03/19/23.
