Can anyone give me an idea of what would be a max charge of universal clays in a Ruger Bisley 45 Colt with a 250 grain RNFP sized at 0.453" with 0.4525" throats? I shot some mid-kansas cast bullets yesterday with 10.0 grains of univ. clays. Accuracy from sandbags with 2x scope averaged 1.7" at 25 yards. I had some fliers though (5 shot group average was 1.3") and wonder if a bit more powder might eliminate fliers. I shot one group at 50 yards and it was 5.25", bigger than expected based on 25 yard group sizes. I vaguely remember Marshall saying why that might happen but do not remember his answer (was it stability?). With throats at 0.4525" should I try bullets sized to 0.453"? Thanks to all who reply, Brian C.