Actually the primers cause pure **** on accuracy and crud rings. The full power primers can cause horrible accuracy and not to mention the crud ring.
I did some shooting today with the white hots and cci 209m primers. I think 6" 3 shot group was the best i could pull off. I did pull a 14" group with the T7 magnum pellets though! And here i was all upset over the 6" group LOL.
Primers, they DO make a difference.
The White Hots do clean up a lot easier, the fouling seems softer and when you push a damp patch down the bore, you push out greyish/white fouling.