I have the same rifle as well. It shoots three different Hornady factory loads into an inch or better at 100 yards. The bolt must be pulled rapidly to the rear for the Mauser style ejector to eject the case quickly. If you withdraw it slowly,the case with barely clear the action. This is different from the spring loaded ejectors on most push feed rifles,but can be used to your advantage. Run it slow if you want to keep your brass close at hand on the bench. In the field,take Jeff Cooper's advice and show that bolt no mercy.

I would run the bolt hard and try Hornady Ammo. Most likely all you need to do.