I know this is an old thread, but I finally broke down and bought a Sako Kodiak 375 h&h. It has a 21.3" barrel. So far I have only loaded 300 gr TSX bullets with RL15 powder. I'm getting 2450 fps with 71.5 gr RL15, using my Pro Chrono, chronograph. This is shown as a max load on the Barnes web site. They show a velocity of 2589 fps. Do any of you care to load this bullet/powder combo in a 24" barrel rifle, so we can see what the real world velocity difference is?