After an hour of sorting, and bad lighting, I grabbed a spent .22 case and try to encompass the primer pocket. It's not an exact match, but it's a quick ref. Also, I have choosen to just hold on to the sp brass until I can get some real data. Less area= higher pressure? Small primers may contribute to a higher/lower peak? "What if I just load to min?"=squib? I gotta measure them, but I've been told that the o.d. of these cases are smaller aswell. I'll just wait for hogdon;)