I know we shoot our loads by volume. which is also pretty close to weight for FFg) but does anybody know how much ACTUAL volume (or maybe the correct term is displacement?) a normally loaded and compressed load takes up?? I'm trying to figure out what the actual minimum load I could load would be and still fully cover a vent liner. Of course, it will vary by caliber as to powder height, but the volume of a compressed 10 gr. load would send me on my merry way. I can do the calculations from there.