Ok...
But it's good for 147 and lots of people use it.....
FWIW, I've run a similiar OAL and velocity and had good results so sounds like something else is going on.
I hate the -sometimes some guns, some combinations- but maybe that's what you got and the search will continue.
My current 147 load out of my G34 is:
147 Black and Blue Bullet RN
1.16 COL
3.6 WSF
.377 Crimp
Range Brass
CCI 500