I contacted Remington and they confirmed the barrel is 1:9 twist. My understanding is that this should eliminate the need to drop to a lighter bullet.
First on the agenda is to glass bed the barrel and make sure it is fully free floating.
Then will work up some loads with a slightly faster burning powder.
Then experiment with bullet seating depth.
I appreciate all the feedback. If you guys think of anything else, please keep it coming.
I want to get this rifle shooting to it's best potential before I pass it on to my son. It's becoming a great Father/Son project as well as a great learning experience.