Try Remington Core-Loct 150-180 grain rounds. I like 150s for most deer, 165 for huge bucks weighing around 200 lbs, and think 180s are best for Elk-sized game. My son's Rem 700, 30-06, groups Core-Locts consistently 5/8" at 100 yards (Why the heck did I ever part with that rifle?).
Another good choice is Federal premiums, and Hornady premiums, but if your rifle likes Core-Locts, stick with them...they won't let you down by being too hard or too soft.
I used to like Winchester Power Points, but they're not as accurate in most of the rifles I've sighted-in for folks.
People are like rifles. Some are tried and true, having great eyes, personality, and fun to be with. Others never seem to hit the mark with you. Still others go off half-cocked. Still, it's nice to know most of them.