Re: VV-N550 What are you using it in?
The burn rate is very similar to 4350 either IMR, or Hodgdon. With the 30-06's I was able to get more velocity than with IMR-4350 at close to the same charge weight. I do like the powder even though it is more expensive than IMR or Hodgdon.
The Nosler #6 loading guide gives quite a bit on information on N550 in the 300WSM. This manual shows that N550 is the most accurate powder tested with 125 grain BT,and 180 grain bullets. It also shows that N550 produced the highs velocity with 150, and 168 grain bullets, so I found that it was a very good powder for the 300WSM.