Does anybody know where to get good ballistics data for TC Shock Wave bullets?

I tried the TC and Hogdon web sites. Hogdon had very limited info and no loads over 100gr. I'm wanting to shoot the 250 Gr. Shock Wave with 3 50 gr 777 pellets. The gun shop owner I got them from shoots the same load in an Encore 209x50 (same one I have). Said 2 inches high at 100 yards is 3 in. low at 200.
I'd like to confirm that somehow before having to validate it burning a lot of powder. Anyone have experience with this combination?