Over the last year or so I've been working on a 338 RUM. I tried several different bullets and loads but eventually settled on 225 Swift A Frames over RL-22. I got very nice accuracy and velocity. My notes show that in March of 06 (temps in 50-60s)I got 3140 avg velocity for 9 rounds fired. In August of 06 (90s high humidity) I got 3130 avg for 9 shots fired in 3 shot groups with no pressure and excellent accuracy again. Just last week in 10 degree weather my friend hicountry fired some of this same load out of my gun over his chrony at 3134 fps and again no pressures and excellent velocity. I have done this enough times with this rifle and load as well as loads with RL-22 in other rifles from 300 Win, 300 Wthby, 300 Jarrett, 270 Win, .280 AI and a few others to be totally confident in RL-22. Thanks, 163bc