Vihtavuori powder

[Cnkhunting]

I have read a couple comments on this powder that says it corrosive or that it's hard on barrels. Those that use it , is this true?

 

[Dmagna]

What powder? They are all different

 

[RegionRat]

No, nothing unusual about VV powder compared to other modern smokeless powder.
They make single base and double base powders that are competitive with the same versions from other brands.
Several VV powders are considered best in class, so I don't understand where those comments are coming from.

 

[Cnkhunting]

The 500 series

 

[Cnkhunting]

No, nothing unusual about VV powder compared to other modern smokeless powder.
They make single base and double base powders that are competitive with the same versions from other brands.
Several VV powders are considered best in class, so I don't understand where those comments are coming from.

They stated the older the powder gets the hotter it gets

 

[VinceMule]

Yes, the 500 series are some of the very hottest burning powders. ON the other hand, the N160 and N165 burn cool.

 

[Cnkhunting]

I'm looking for some that would be good for 7mag-7prc.

 

[RegionRat]

The 500 series

Double base powders means that instead of just nitrocellulose they add nitroglycerine. Nitroglycerine adds energy or "heat" to the combustion that can add pressure, wear, and heat. But that is true for all double base powders.

They stated the older the powder gets the hotter it gets

There can be some truth to this in terms of how powders can age as the solvents outgas over time.
Again, this isn't unique to VV powders and true for all brands to some degree.

 

[Dmagna]

The 500 series

N570 is probably the one you are referring too the most. N570 provides a significant gain in speed over many other magnum powders. But there is always a downfall to speed. It is very hard on barrels, just the way it is.

 

[RegionRat]

I'm looking for some that would be good for 7mag-7prc.

Then I would check the published recipes and give it a try. If folks are trying to talk you out of VV as a brand, then they are being silly.

Their numbering system is a little different, but not hard to understand.

A 1XX is a single base, a 5XX is a double base.

 

[FireFlyFishing]

Then I would check the published recipes and give it a try. If folks are trying to talk you out of VV as a brand, then they are being silly.

Their numbering system is a little different, but not hard to understand.

A 1XX is a single base, a 5XX is a double base.

Yep.
You the burn rate chart to find what will work in the desired cartridge.

 

[RegionRat]

I'm looking for some that would be good for 7mag-7prc.

https://www.vihtavuori.com/reloading-data/rifle-reloading/?cartridge=74

 

[Seabeeken]

N-555 3750 KJ/Kg
N-550 3950
N-560 3900
N-540 4000
N-570 4000
N-140 3600
N-170 3700
N-150 3790
H-4350 3900
Varget 4000
H1000 3780
H4831 3850

For comparison via GRT

 

[Cnkhunting]

What is this?