Does anyone know what Barnes uses for powder? It is very small measured 68.1 and 68.3 grains. It isn't any of the RL or IMR 4350 or IMR 4831 for more than one reason. Thanks in Advance!

Ok let me Clarify.
The grain size is very small, about 1/5 the size of 4831.
Pulled a Black Hills 62 grain TSX the other day, that powder was even smaller than what came out of the Barnes 300 wsm.
Are they using special powders that we can't acquire?