I buy another lot of this same powder and come up with a VMD of. Say I have "worked" up a load of 10 grains of xyz powder to give me a velocity of 1000 fps and this powder has a VMD of. Horseman wrote:More thinking on this subject. Posts: 935 Joined: Has thanked: 36 times Been thanked: 247 times My Press Choice: Single Stage Location: Washington State Perhaps I'm over working this but when I learn (I think I've learned) something new at my age I get pretty excited. Yes, I know that's why we "work up" loads, but it would be nice to have that "baseline" just the same. Would be easier, for me, if reloading manuals would use the VMD of the powder lot used when they worked their load information so we would have a baseline for that load. More reading needed to turn on the light. So now, MY interpretation is, (please correct me if incorrect) that the denser the lot of a given powder the more "energy" it will produce at the same charge weight as a "less" dense lot? Still not sure how I'll use this information, I'm a slow learner by nature but I'm sure something will eventually come to me. No, I never put it together in that relationship. NOW, that statement makes sense to me because the density changes lot to lot. I do this with bottleneck rifle but not pistol stuff as pressure signs are difficult to really read in straight wall pistol rounds. The first thought I had when this started sinking in was the statement "always rework your loads when you change to a different lot number of powder as it can vary by at least 10%". I hope I can do this without confusing everyone with my "thinking". ![]() The discussion on VMD on another post started to wake up some brain cells so I thought I would continue with the VMD discussion on a new post as I was afraid I'd "muddy" up the one where we started the discussion although it does apply.
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