Not a 7mm. but have loaded RL-22 in the .300 Win. A perfect match with 180's most of the time. I have chronographed RL-22 from the mid ninety degress to 23 degrees and it lost right at 2 feet per second per degree of temperature reduction. I have found that different lots can vary, sometimes quite a bit. Though I don't get the high velocities that can be attained with RL-22, I have found that the Hodgdon Extremes seem to be much more consistant. Maybe, if using RL-22, buy a 5 pound jug and develope a summer and winter load ?
FWIW,
Jim
