I'm glad to see intrest in the .338 RUM! I'm currently finding great results with IMR 7828, RL22' and RL25. I'm shooting a 225gr Hornady INTLK at 3148.68fps average velocity with a standard deviation of 8.60. This load using 92.0gr of IMR 7828 cuts right under .5 most every time I shoot it. I also have a beautiful shooting load using a 250gr Hornady INTLK and 90.0gr of IMR 7828 that averages 2951fps with a SD od 12.72 this also produces .5 to .75in groups. This year for deer season I'm starting with a 210gr Barnes TSXBT and 96.0gr of RL22 this is an accurate load for me that produces a .75in groups with an average of 3395fps and SD of 14.31 wich produces 5374 ftlbs at the muzzel! This will be used for deer and the next will be a 210 Scirocco and 96.0gr of RL25 this load produces and average of 3236fps and a SD of 14.21 this load also leaves with 4883ftlbs at the muzzel. These are a few of my loads. I admitt this more than is required for deer and antalope this year but I can't help myself it is so accurate and damn fun to shoot. Hope this intresting enough!