I shoot a 300Wby some times for deer, and I have GREAT accuracy from Federals 180gr. Nosler Partition. My deer are not that big here in PA, but I get groupes of 1/2" or less at 200 yards off a rest. Also they do the job. I shot an 8 point 2 years ago at 165 yards and it dressed out at 200 lbs. the biggest buck I have ever killed. Give the a try you will switch.
Don