vihtavuori powder for subsonics

[.7mm.]

I'm looking for a good powder to use as a replacement for unique or trailboss since both are not available.

Seems like vihtavuori is obtainable. Anyone use them for subs? Mainly loading for 45-70 and 10mm subsonic.

Burn rate chart shows N320 and N330 to be right around the same burn as Unique and Trailboss

 

[K.E.C. Darkside]

I don't know the answer to your questions.
I would give them a call 660-460-2802.
This is Berger's phone number also, just ask for tech at Vihtavuori.
Hope this helps.

 

[Silver_Is_Money]

I'm looking for a good powder to use as a replacement for unique or trailboss since both are not available.

Seems like vihtavuori is obtainable. Anyone use them for subs? Mainly loading for 45-70 and 10mm subsonic.

Burn rate chart shows N320 and N330 to be right around the same burn as Unique and Trailboss

I'd say N320 is closer to Green Dot, and N330 is a pinch slower than Unique.

As I see the 300 series it looks ballpark loosely like this. This was derived for shotshell use, so YMMV when it comes to pistols. And it is merely my speculative opinion, so whatever you may think of it, absolutely don't bank on it:

N310, ~Titewad
N320, ~Green Dot
N330, ~Unique
N340, ~Somewhere between Herco & 572
N350, ~Longshot
3N37, ~Somewhere between Longshot & Blue Dot
3N38, ~Blue Dot