With Quickload you adjust the burn rate in Quickload until it matches your chronograph velocity.

There are far too many variables with firearms and reloading components for Quickload to give more than guesstimates until you adjust case capacity and actual velocity.

Adjusting the Powder Burn rate Factor and the Bullet Weight to Help Match QL to Range Chronograph Data:
http://www.the-long-family.com/Tunin...%20results.pdf