First, there is a thread in the Reloading Depot for 6XC. That being said, I have had very promising results with the 105 Hybrids. I have worked up a load that has given me a 5 shot group of 5/8" at 200 yards prone from a bipod. I am using Norma brass and CCI 200 primers and H4350. My old, cheep cronograph gave me right at 3100 fps.