N568 Vihtavuori Powder

highdrum

Well-Known Member
Joined
Nov 30, 2008
Messages
2,767
Location
Montana
Its prob a real low charge but better safe than sorry. Chrono it for nodes

Kasey
I ran up to 61.9 gr N570 in my prc when barrel was fairly new. After a few hundred rounds max is 60.8, still running 3100 w/ 156s. There's a good node @ 3080 so that's where I run it 60.5. The early description of n568 was essentially short cut N570. Whether this is true or not, I don't know. N5XX series powders burn very hot, excellerate throat wear and carbon foul really badly. They are(minus 560)very temp insensitive, and usually make top velocity. There's pros and cons. Clean your barrel often! And get a teslong bore scope to keep an eye out for carbon rings in the chamber neck and throat.
 

Tyler25246

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Joined
Oct 26, 2018
Messages
125
Location
Northern CA
I ran up to 61.9 gr N570 in my prc when barrel was fairly new. After a few hundred rounds max is 60.8, still running 3100 w/ 156s. There's a good node @ 3080 so that's where I run it 60.5. The early description of n568 was essentially short cut N570. Whether this is true or not, I don't know. N5XX series powders burn very hot, excellerate throat wear and carbon foul really badly. They are(minus 560)very temp insensitive, and usually make top velocity. There's pros and cons. Clean your barrel often! And get a teslong bore scope to keep an eye out for carbon rings in the chamber neck and throat.
Have you noticed n560 is pretty temp sensitive?
 

2ndson

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Joined
May 14, 2020
Messages
123
Location
OK
be interesting to try it out. Really like there line of powders, it’s just a shame that with trying to find powder these days it may be years before that happens.
 
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