LAGS, that's probably the most sensible thing I've heard in a long time. Sometimes the simple solution is the best. I guess the 'normal' measurement is really just based on an arbitrary figure so there is no need to chase this perceived problem forever.
Although your density problem is solved, I'm going to try for a little higher density again as my powder is around 0.86 g/cc and I am about to start loading cartridges. I finally found my black powder gun! It is a Savage 219 chambered in 25-20. The cartridge is tiny and I can only fit about 13g of my powder( to the base of the neck)into a cartridge that traditionally held 20g. It will be a perfect size gun for ise my little farm which means I can test things without going to the local range which is only open on Sundays.