I have a 7x57 I am always looking for the perfect combo for on elk. I have loaded, 140 gr. bullets of every make,150 gr core lokts 160 gr Nos. Part. ,160 gr Trophy Bondeds and 175 gr Rem core lokts.
The one time I actually used it on elk I made a shot of about 150 yds on a raghorn that was trotting through the woods quartering away. Bullet hit the last long rib on the right side and penetrated through lungs, made a half dollar sized hole through heart and ended in the base of neck on left side. Bull was in steep terrain and made it down hil about 200 yds. but was dead in seconds.
The load was 150 gr. core lokt at a muzzle velocity of 2600fps . Not the hottest load but most CONSISTENT..
My wife will carry the same load and gun this afternoon and tomorrow looking for a cow to add to the freezer.