I finally got out to try my .338 with the 225 gr Barnes X bullet loads. I didn't have time to chrono the loads with the rain coming in, but the 71 gr of IMR-4350 and 72 gr of RL-22 loads both shot sub-MOA groups. In fact, the RL-22 loads were much less than an inch. With the Hornady 225 gr bullet, my Tikka preferred a 72 gr load of IMR-4350. I will probably stick with the RL-load, as the groups were smaller, but that load kicks like a mule off the bench!