Just put this together yesterday:
139 Scenar
47.0 H4831SC
210m
2x fired necked-down WW 7-08 brass
It's half MOA at 100y and at 300y with less than 1" vertical at 300y. That's five rounds per group, but only had time for one group each at 100 and 300. From a 100y Z I'm up exactly 1 MIL at 300y...