I placed ammo in the freezer and ammo in the oven and got the ammo to about 110 degrees. I experienced discrepancies of up to 130fps with the Extreme powders. The hot ammo grouped the best and had some noticeable pressure signs that were not experienced in the cold ammo. I went to RL 25 in the 7wby which gave the best velocity and accuracy and experienced velocity discrepancies of about 75fps on average.
