OK
Quickload is just a theoretical prediction.
With Quickload, I am not able to specify which primer, so I assume this data is based on using small rifle primers.
6BR Norma,
.243, 105gr Berger BTHP #24428,
Loaded length 2.44",
barrel length 26",
40.64gr RL-17,
MV 3500fps
Pressure...