RC Try a different manufacturer when choosing bullets. Some firearms just don't like certain loads. I have a Ruger Blackhawk in 44 mag. I purchased Remington 240 grain bullets that were very very accurate. A local gun shop had a sale on Peter's bullets in 240 grain. My revolver went from tight groups to spraying all over the target. I opened the box of Remington's and I was back to punching holes. Pick the bullet type you need for your hunting situation and try a few assorted boxes of ammo. I think you will find one that you rifle loves.
Good Hunting....