Ive hunted for decades with mostly 340 wby and 375 H&H rifles, but the camp BACK-UP rifle we packed for decades was a marlin 45/70 loaded with a hard cast 400 grain bullet over 49 grains of IMR 3031 and a 215 fed primer, thats stout but several grains lower that the max listed powder charge.
over several decades many guys found they had fogged scopes or broken scope mounts , etc.
and they were more or less forced to use the camp back up rifle, that 45/70 was sighted in at 3.5" high at 100 yards ... that rifle made a whole bunch of people believers in that 45/70 as an elk and mule deer gun.. enough so that several guys purchased one themselves, after using it and seeing how well it worked in the conifer and aspen where we very seldom saw game past 175 yards.
yes the magazines all promote the newest super wizz bang magnums in 6.5mm, -30 caliber, but most of the experienced hunters, in my group, have seen what cartridges like a 35 Whelan or a 45/70 or 450 marlin have done to deer and elk, in fact I'm the last old geezer , in that group,that still hunts with a magnum 375 H&H sako carbine, almost everyone else has swapped to a 308 win or 358 win blr or a cartridge like a 338/06 or 35 Whelan years ago! my carbine looks very similar to this
https://garage.grumpysperformance.co...d9a652d83ca7bc