I’ve killed a bunch of deer with Sierra Pro Hunters and Game Kings. 243, 260, 7-08, 270, 308 and 7mag. They all worked, no failures. Although I shoot more Nosler Ballistic Tips than anything else now for deer, consider me in the Sierra camp between your choices.
Same here as far as shooting more Ballistic Tips for deer. As far as the OP’s choices go, Sierra would be my choice, but I prefer the Pro-Hunter flat base over the Gameking due to more consistent accuracy at the distances I shoot at big game. (300 yds or less) The Pro-Hunter, in my experience anyway, seems to be a little tougher bullet than the Gameking. For whatever the reason, I’ve never gotten the same accuracy with Speer bullets. Also, I have tried and tried to use the often recommended Hornady Interlock in several calibers without the results that others seem to have with that bullet.
