Roy,
Why use a 12 gauge load in a 10 gauge?
I use a volume measurer with a square load of 1-3/8's oz shot and same dipper for 2 FFG real black powder with appropriate wads and a roll crimp. Yeah sometimes the knockdowns come back up but isn't that a part of shooting a big 10!?!?!?!
Jasper
My wife was a traveling nurse a life time ago and we spent the first few months of '04 in Tucson. I met those fine people and spent a good amount of time in their shop. GOOD TIMES!!!!!