Gents, Went to the range today with my younger son, he's been feeling left out with big brother and dad doing all the shooting. Intent for the day was to finalize scope settings for my .300WM and try out Varget in a .375 load. Things went well with .300WM with my 200gr A-Frame load repeating as it has several times. 5 shots into a 1" group, set 2" inches high at 100. I had cleaned this barrel this week and loaded up ten 200gr NP's for fouling. As luck would have it I bumped into another accurate load with the last three shots, go figure. So on to the .375. This is where things got a little strange. I've got two loads in 270gr A-Frames and North Forks that both use RL15. Both have been repeatable 1" or better groups, but not today. The groups opened up where the furthest shots apart were 2" or so. The biggest difference I can tell from last week when I shot those loads was the temperature. Last Saturday in the low 80's, this morning high 50's to about 60 degrees F. So the question for you is have you experienced RL15 to be temp sensitive to a change of 22-25 degrees in this temp range? I hope not, I bought a 5lb jug of the stuff after last week's shoot!! In some fairness, I have put quite a few shots down the tube since it was last cleaned, perhaps it's showing in the groups opening up?