My .375 goes 10 lbs and change all up, so I would not consider it an ideal elk rifle, though the cartridge is an outstanding choice for wapiti. I also had a .270 WBY Accumark for several years, using it on numerous whitetail and mule deer, and I believe it to be ballistically one of the best cartridges available for an "all 'rounder". Given your options, my vote is .270 WBY, I liked the 140 AB's and 130 TSX's in the WBY, though heavier is available and the WBY has the horsepower to push them.