Later that day, my shoulder was a little sore as was my jaw.
THAT should not be happening. Either your form is somewhat incorrect, or the gun needs adjustment to fit you more properly.
The buttstock should be in the "pocket" between your collarbone and shoulder, and your cheek should be just slightly resting on the comb. If you are mashing your cheek down in order to eliminate seeing rib, then use the shims to adjust the stock for a better fit