mike:I shoot the qt's 40 in 235 grain with 110 grains of pyrodex select@ a no#11 cci mag cap groups 3 shots at the 100 in a 3/4 hole.when I was shooting the powerbelts always would pick up a flyer in a 3 shot group.I do compress my load with consistant pressure.what you can also try is pyrodex select and see how the gun shoots it may not like the triple 777.