I have heard lots talk about the crud ring but have never experienced it in my Rem 700. I have used both loose and pellet forms of T7 with winchester 209 primers, I swab between each shot with a windex/water solution and dry patch..GTG. I don't bore butter, wonder lube or anything similar in my bore, just clean with hot water, dry patch it, light oil and a few dry patchs to remove the oil prior to firing.

Not sure if I am just lucky or what, just haven't had a prob with T7!