ok with the White Hots / T7 Magnums, i can not swab or else accuracy just isnt there. With the 250gr thor and t7 magnum pellets i had to rough it down the bore twice but the first 2 shots were touching and the third one opened it up to a 1" group. The 300's with the imr white hots i did the same thing with and got a 1 1/2" group.

These crud rings really do suck though.