Karamojo Bell, professional elephant hunter killed hundreds of elephants with the 275 Rigby which is identical to the 7X57. I think he used steel jacketed round nosed bullets of 175 grains.
I have a Winchester M70 Featherweight 7X57 I bought for my wife. She used it only once, because she only went deer hunting only once. She is just not a hunter.
Every hunter in the family, however has kill at least one (some of us several, one grandson got 2 with one shot) deer with that rifle, son, three grandsons and a granddaughter.
All of my grandsons now have their own 7mm rifles, all 7mm08 because of availability of rifles in that caliber vs the 7X57.