In a modern rifle why would it not be loaded (handloaded) to the same 55,000cup/60,000psi of its companions of say a .270win or any of the mags. A rem. 700 is a 700 is a 700. They do not use a weaker action for the 7mmMauser chambering. All of this is to say, that the published load data for the 7x57 is pedestrian, near pathetic. It has more case capacity than the cartridge it is always compared to (7mm-08) and will surely bare down hard on 3000fps (pending barrel length) with a 140gr bullet.

Our "family" Ruger 77 in 7x57 has a mile of leade along with a barrel that fouls like no other. The old go-to in this was the 150gr Rem PSPCL with 48grs imr4350 for 2750. Very accurate and has claimed one bull Elk in my Brothers hands, along with numerous deer. My Brother wants a exit wound, so has experimented with a few 160's and is using the tried and true Nosler with a above published load of imr4831 for 2800ish.

Tward, most any of the tougher conventional bullets of 139-160gr will work fine at your desire of 2700fps. Remember Rigby's .275 H.V. was a really shitty 140gr bullet at a listed 2750 in a 28" barrel.