I just came from shooting ground and very satisfied by my found -Vihta Vuori #120 works just fine in BP DR!
Trans formula Nitro-for-black 40-42% is true for VV also.
VV #120 just a little bit slower (Relative Burning Quickness), than IMR 4198, that's why formula could be 42-44% for VV #120 with the same pressure limits, but a bit higher velocity.


Geno.