Well I tried the same powder wads and .310 buckshot I had poured
27,28,29 grain charge weights 16 pellets each stacked by twos covered in bpi original
Ctps wad trimmed 1/4 inch off slit four time left around half inch from bottom
I also tried these at 65 yards but forgot to get a picture results for that test is below
27 grains only had 7 pellets on target
28 had 8 on target
29 had 11 on target
It was the furthest I have tested still not very happy with the results but will try again!