Version 1.0 20 March 2020
Original program live to Internet
Version 1.1 22 May 2020
New shot start pressure model incorporated
New barrel friction model incorporated
New heat loss to barrel model incorporated
Version 1.2 29 May 2020
All Vihtavuori N100 powders (except N105) and N500 powders incorporated
Version 1.3 02 June 2020
Vivacities of all powders increased by around 5% to reconcile the fact that the model assumes the bullet is touching the lands whereas most reloading handbook data is for the bullet off the lands. This should correct a general trend for velocities to be low.
Version 1.4 09 June 2020
Improved equation for 'work done' put in.
Bug in Runge Kutta 2nd order interpolation corrected. (Simulator results now independent of delta t up to 100 microsecond time step).
Chemie-Swiss and Vihtavuori powder models re-calibrated for improved simulator function.
Version 1.5 01 July 2020
Modification to powder models allowing vivacity at Z = 0 to be set. All vivacities at Z = 0 set equal to given vivacities at Z = 0.1, so nominally the powder models are unchanged. Change in the vivacity interpolation method so that vivacities between Z = 0 and Z = 0.1 are interpolated and not fixed. Changes should mean powders are slightly more progressive, so this will reduce pressures slightly with little change in velocity.
Feedback form removed.
Change in counter analytics so that day of use rather than day of entry is recorded in the analytics file.