Funny, if you go to Randy Garrett's trophy room, that huge bear was taken with Garrett's ammunition and a mountain gun, so the story goes. Gun is not going to break, bend or blow up. Only thing that gets hurt are Ruger owners feelings when they see the superiority of their chunky fugly (that's f*ing ugly for those that don't understand my slang) guns fade away.
TVDean, your mountain gun will work fine with the ammunition you have mentioned and will do the job on any game that roams on this continent.
Robert