The RL17 loads in my 270s worked up loads until short brass life and then backed off a safety margin are giving me some amazing velocity.
3225 fps 130 gr from a 22" barrel.
I would not have believed that possible.
150 gr over 3000 fps from a 22" barrel. Finally, after all these years, some recoil from my 270.
I asked the author, kombayotch, of the pic how he controlled the temperature.
-The cold batch of ammo went in the clubhouse freezer (a cooler full of regular ice also works).
-The room temperature ammo just sat on the bench
-The high temperature ammo was wrapped in a heating pad and put in a small cooler. 175F is only 80C...