Don't forget there's 2 different factory pressure loadings in the 7 x 57. One, the lower one, is to prevent pressures of 50K or so in M 93 and M 95 Mausers and is noted as 7mm Mauser. The other, for 98 Mauser and other modern actions is noted as 7 x 57 Mauser or just 7 x 57. Makes a ton of difference which load you use.

Wayne