Originally Posted By: L. Brown
....Obviously, since we know there's only one peak pressure per load after which the pressure drops, it clearly doesn't remain the same from the breech to the muzzle. And we all know that pressure drops faster in some loads than in others. But what the heck is the whole "total pressure" thing about?....

What's it about? Awe c'mon Larry, why is there always discussion here about "low pressure" loads? Are you saying that if I were looking to end up at a particular velocity, all else equal, that two different "average" pressures can end up with the same velocity?

I have no idea, how many of the same load might Tom A. recommend be tested to come up with an 'average' what have you data for the particular load?