Howdy all, I wonder if there is any new data or tricks to help with predicting RL 17? I put in the Speer 180 SPBT and 66 gr RL 17 as shown by the Alliant website and QL came up with 71k psi. I do NOT fault QL as I figure it must be the use of the retardant blended throughout the powder rather than just a coating on the kernals that gives the funky data. Thanks