I bought a pack of these to try in my new Knight Disc Elite in the 250 grain Red Hots ( Barnes Expander MZ ). With a load of 3 777 pelletsI was getting terrible results about 2 1/2 inch groups at 100 yards and I know this gun is better than that... I got to looking and the sabot petals were blown clean off,,, all the MMP's I have everused looked perfect after the shot. Also when I cleaned the gun I was getting a good bit of copper fouling on the patches??? It seems to me that the sabots were self destructing upon ignition and the Barnes copper bullet being undersized for the bore was bouncing around before going down range causing the poor accuracy. I going back to the range soon with the Barnes loaded in some HPH12's... hopefully this is the fix!