We got a big lot at our dept and when we were on the range to re-zero we all saw a large amount of deviation between it and the FGMM. First thing I noticed is that I didn't need to adjust my dope at all between 100 and 200yds. Went back to the range a couple of days after and everything settled down nicely. Everything has been fine for the last couple of months until yesterday when everyone(5 different rifles) all had zero problems and dope issues. I was back to no dope required at 200yds and even my 100yd zero shifted an inch high. I did notice that it happened shortly after it started warming up a bit but it wasn't in the triple digits by any means. Just curious to know if anyone else has seen this, I'm guessing what ever powder Winchester is using is a bit temperature sensitive.