I would try different ammo if I was limited to factory ammo (which by the way is more than just ok for hunting). I would do nothing to the gun until I was handloading and then I would begin to eliminate other limitations found in the gun, if they still exist.
And with that said I don't hunt with neck sized maximun length custom hand loads because I don't like the way they cycle in the gun. I also find that neck tension and max overall length that yeilds great accuracy was not considered by the gun manufacturer in it's design. Factory loads that yield ok accuracy are a great choice for hunting.
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