[quote=Michael Petrov
I’m retired now so I don’t have the time to redo the test but if anyone cares to undertake this and if you find that FFF weighs more than FF per same volume I’ll amend my notes.
[/quote]
I don't have data, but doubt very much that this could be the case. One would presume more airspace in any given volume of FFFG, though the difference would be small (as is indicated by the values given). One could use the metaphor of splitting wood: If you start with a pile of logs and keep splitting smaller and smaller the pile will get bigger and bigger. How's that for science?
Also someone commented that any primer will do as black is "easy to ignite". Of course this is true, but remember the serious rifle guys use the hottest primer they can find and get measurably superior results. That said, I doubt it would have any real application in shotguns but could be worth investigating.
