I have a pro hunter with a TC Custom shop 22" stainless 35 Whelen barrel. Thought I would try the new Hornady Superperformance in it. It has me worried. It would group 2-3 and then would send out a flyer, and in talking 8 -10 inches, then every other shot was a flyer. Didn't have the problem with the Double Tap ammo, any thoughts.