For the 7x57 Mauser try to find a 150 grain bullet for deer, even 140 will do. Those heavy bullets around 175 grain will be at an "disavantage" for deer sized animials in 7mm cal..

The 7x57 is a great cartridge, but like all cartridges, you need to match the bullet for the size animial you are hunting. Useing too heavy of a bullet will cause you to loose animials, because the small animial doesn't offer up enough resistance for the heavier bullet to expand well.

Drilling Man