ChuckH:

Thanks for the info. Regarding posted pressure, for every cartridge a manufacture makes do they fire the cartridge in a test gun to get the pressure or it is a calculation. group velocity outside the barrel isn't that difficult to measure but I was curious about their pressure values like you would find here:
http://www.tiropratico.com/ricarica/manuali/REX%20Nitrokemia-.pdf
Is all the given data from measurements?

Kind Regards,

Raimey
rse

Last edited by ellenbr; 09/11/08 04:08 PM.