I've been blessed to live and hunt in CO for 25 some odd years. As a family we have killed a lot of critters here. As has been mentioned, bullets matter more than headstamps. If I didn't reload, I'd buy only a 7mm Rem, a 30-06, a 270, 6.5 PRC or 6.5 Creedmoor. Then buy a Tikka, a Nightforce NXS...