COLORADO: As this LOOOOONG thread shows, plenty of fine bullets out there...and plenty of opinions.
Here's one of the latter: with the very powerful firearm you are using, try the A-Square Dead Tough. Or, if you want/need a solid, A-Square Monolithic. Work awfuly well when downloaded. Accurate, consistent in quality and real-world performance.
BUT:
1. Not always easy to buy; and,
2. Bring your wallet.