von s
as I understand it, the mauser 98 is of quite soft steel, case hardened.
it was specifically made this way, as in the day metallurgy was not advanced.
the soft steel would certainly set back, but would not shatter like some eddystone enfields and some springfields.
shattering steels would just let go, far worse than softer steel just yielding a little in setback.
pre ww1 actions were known to set back more than later ones, and 1909s for some reason were among the most prone to this.
the best military mausers were the post war f.n. 98s, probably because metallurgy had advanced by then.
those fn actions were as smooth as silk, and some made for 30/06, giving them a good mag length.
interestingly, some gunsmiths liked this setback, as when it happened both lugs bore more evenly in their recesses.
to this day accurizing modern actions involves machining locking lug recesses and the lugs square to the axis of the action to bear evenly, other than such as Dakota which are manufactured that way in the first place, and machining is done after heat treating so any bending had happened before maching, meaning the bolthole, lug recesses, lugs, and front face of the receiver ring are all true or square to true.
this is part of the reason a Dakota action costs more than a military junker.
bruce.