Jud, nice looking deer and bullet!
I have fired exactly one 225 SGK into a deer from my Whelen. Quartering to shot at about 90 yards +/- on an average sized doe. Entered the onside shoulder, traveled the length of the animal and lodged in the hide at the front of the offside hip. Muzzle velocity was 2630 +/- which would put the impact velocity around 2430. Picture perfect mushroom and decent weight retention.