I am not sure as to where I should post this. You guys in rimfire seem to me to be the more dedicated followers of helping people like me so I will put my post here. I do archaeological research in my local area and have in the past been more interested in lithic, {made from rocks or stone} depending on the regional terminologly. I, as well as my partner in crime, are amatuers, we do this for pleasure and not for money. Between us we have several degrees in Anthro and archaeology, yet we are farmers for our livings. Throughout our studies of our local area we have found lots of old brass, some rimfire and some centerfire and some old shotgun shell bases. Some of the rimfire brass seems to have been struck on both sides of the case rim as if it were a two piece firing pin. Is there a possibility of that, or were they turning the round over to take another whack at it? I don't have all the old brass with me right now but remember it at being .40 to .50 cal and a short case. If there is a refrence book out there about old brass I would like to buy it. If anyone is interested, I will pull the boxes and give detailed measurements as well as headstamps. This holds no value to me but if it does to some other person who is doing research in this area of cases, I would be very easy to get along with as far as transfering what we have to someone for research. If it were something other than research, like monetary gain, the person should know why I watch Snipershide and be very wary. Regards, FM