Welcome to graybeard, bountyhunter. That's a nice sounding rifle you've got set up. I'm a fan of 6.5mm/.264" cartridges myself. That Hornady 129 grain bullet is a great choice for all-around hunting, and the Nosler 125 grain partition is great, too. If you're shooting half inch groups with the Hornady bullets, though, you're already set. Those will work for elk, too, if you place them well. It sounds like you can do that, so you're set for hunting in the lower 48 states.
Good luck this hunting season, and let us know how you do.