Not sure if they have a silver jacket or not, but dad just got some 250's to use in the 338 WSM. Will let you know how they do on a moose but, he'll probably hit it with the 300gr SMK tho. Both shoot about equally in his rifle, a hair over 1/2 moa at 200yds. The 300gr at 2450 fps and the 250 at 2780 fps.