New Vihtavuori Powder Released?

[spclark]

I notice N130 drops off Viht's load data for the heavier bullets and so likely I should focus between N135 and N140.

N140's a reliable choice here among our US 'service rifle' shooters pushing Sierra's 69 grain bullets out of 20" barrels. N130 might be "off the charts' for published loads yet, with care, you may find a load that works under your conditions though brass life may suffer some. Burn rate's not linear as the VV numbers increase either.

N530 has a following here among shooters using a 6mm variant known as 6HAGAR for light bullets in match rifles (I shoot it) while N140 works nicely with those as well as heavier bullets. This perhaps lends credence (not Creedmoor) to what I'd look at were I in your position.

I briefly messed with N530 when I started looking for cartridge alternatives to 223 in match rifles years ago. Started with 6.5 Grendel, ended with 6HAGAR. Along the way lost a few Grendel cases that unexpectedly developed a magnum-like "belt" just ahead of the extractor groove while I was looking for loads that performed with 105 grain bullets out at 600 yards.

 

[KevinThomas]

SGK,

Sorry for the confusion. Yes, the general trend is, heavier bullets, slower powder. Where you might want N130 (or 530) or 133 for the 52-53 grain projectiles, you might want to consider 133 or 135 for the 60, 63 or 69 grain offerings. I shoot Service Rifle using 77s and 82s and generally run either N140 or N540. But you get the drift. As a rule, the N100 and N500 series will be approximately interchangeable for usage in a given application, that is to say, if N140 is an appropriate choice for your needs, then N540 will also be a good option. Ditto for the rest of the line, and so on. Different loadings of course, but the same applications. Hope that helps!

 

[barefooter56]

How about shelf life with the new powder?

From the VIHTAVOURI website: The estimated shelf-life of Vihtavuori gunpowders is a minimum of 10 years, if stored and sealed in its original containers at a temperature circa 20°C and relative humidity of circa 55 %.

 

[SGK]

Phil - probably a good idea to fix your signature. The Finns will notice.

 

[Dave T]

So everyone reading this thread, just one question, can anyone say when we will be seeing 8lb jugs of N133? Thank you.

 

[lawncare]

Been told May