FWIW I’m not a fan of the OCW method

Maybe it shot at 300 yards plus on an utterly still day but as per the example I gave above the ifferwnces you are looking for just don’t show up at 100 yards.

try shooting ten round groups and don’t be hasty to call fliers.

For proper stats tats you need to shoot thirty, as you probably know.

i would find the highest charge that doesn’t give pressure signs and then fiddle
with seating depth to bring the groups in.

When devloping my tatget load load for my wall varmint 308 I found that 10 round groups showed the truly consistent from the lucky.