High humidity does reduce static. If you load in an air conditioned area, you may not have as much humidity as you think. I know how to produce static but I don’t know how to get rid of it.
You might try sizing with different FL dies and find one that sizes to what you need. I have 3 different dies and all are different. My L.E. Wilson die sizes closest to my chamber so that is the 1 I use. The Lee FL die is the smallest. Measure your fired brass and see what size you are looking...
Your data falls in line with my findings also. I’m using 41.9 and so far it’s the most accurate. I haven’t checked the speed on mine. What seating depth are you using for the Berger Hybrid Target?
I have to agree with the wider node statement. I’ve been developing a load for one of my rifles with RX 16 and it has worked great so far. I’m waiting for delivery of some Berger 140 Hybrids to do my OCW with. I loaded 41.0 grns with Sierra 142 SMK and it shot very well. I wanted to try some...