Recent content by Pirate69

Yes, it is a good program. Once you have actual velocity data for a new load and run the recalculation, you can change the resultant Isentropic exponent and Combustion coefficient (from the initial run and database), on the input screen and project velocities/pressures for any load. There are...

I use both QL and GRT and compare the results. The major difference is that the powder burn rates may be different between the two programs. With the GRT program, as stated in a post above, if you have accurate muzzle velocities and certain other parameters, you can calculate a burn rate for...