So, what tool , in the field, would I use to measure? At home, I've got a powder scale.
1st. Don't try to use the scale to measure your powder. Like was said earlier, always measure black powder (and substitutes) by volumn. Get yourself one of those little clear measuring devices made just for black powder shooting. They kind of look like a fat medical syringe. Some are brass, some are clear plastic.
2nd. For field use (I assume you are talking about hunting), don't try and do any measuring in the field. Get a few plastic speed load containers (like this http://www.grafs.com/retail/catalog/...roductId/18296
). They hold one charge of powder, one bullet/sabot, and one primer. When I'm hunting, I carry the load that is in my gun plus 3 of the pre-made speed loads.