A lot of people imagine that all jacket materials are of similar hardness and pliability, and that all cores are made of the same materials. This just isn't true. Comparing sectioned bullets is only valid if you know the compositions of the jackets and the cores. "Target" bullets often use core material of pure lead or something close to pure lead while "hunting" bullets run the gamut from pure lead to up to 6% antimony, which makes for a VERY hard lead core on a jacketed bullet. Keep these things in mind. Jackets which are annealed after forming steps are far more pliable and deform far more easily than those that haven't been annealed after forming. This stuff matters.
