For grins, I had QuickLoad simulate a burn of enough Varget to produce about 44 ksi peak pressure. It's estimated time trace is remarkably similar in shape to that of the RSI traces. It figures a fair amount (15%) of powder remains to be burned as late as 0.7 msec. Both QL and the RSI traces show points of inflection (in the pressure traces) at about 0.7 msec, indicating the bullet is well out pacing the production of gases, to the point that the curve is starting to look like a simple expansion. At this point, QL estimates the bullet has moved about 6 inches with powder to go.
I wish I had the time and money to run proper experiments on this stuff...
Last edited by 2525; 09/25/09.
