In the pushing the limits thread case volume was mentioned. If Federal and remington cases hold less water than WW, what does , for instance, 3 gains less volume mean? if not just that and the need for more powder to achieve the same velocity in a WW case? I read that a 7x57 WW case weighs nearly 22 grains less than a federal case. Does this mean that the walls are thinner and thus weaker? I expect it is moot for the cautious amongst us but is the case technically weaker? will it stretch more and should you reload them fewer times?
On the other hand I have found that federal cases have split necks when reloading without annealing in my M96 mauser, Norma brass does no such thing. I have put it down to more elastic brass in the case of Norma and generous dimensions in the 96. Is federal brass too thick or inelastic. (an incorrect technical term i am sure)