Is N570 temperature stable?

[ThunderMug]

Is N570 temperature stable?

Is it anywhere close to as stable as H1000?

 

[WeiserBucks]

Yes.

 

[wapitibob]

N570 is magic with the heavies, just feed it a steady diet of new barrels and it’s one happy camper.

 

[High Tech Redneck]

It’s definitely not as stable as H1000, and it does eat barrels. Also burns very dirty, it will deposit a lot of carbon in a suppressor if that’s a concern.

 

[High Tech Redneck]

Vihtavouri also recommends against using N570 with heavy loads in temps below -4 degrees Fahrenheit due to increased pressure. Didn’t know this at the time, had an N570 load go out of tune on a hunt in Alberta several years ago due to super cold temps.

 

[Harvey_NW]

I haven't tested 570 yet but I have done extensive testing on 565 and it is very stable at .77fps/1°F from 29-88°F. Most people I know that have used both say they are very similar in stability.

 

[Bater]

I found it to be very stable in my 28 Nosler but switched to Retumbo to preserve throat and clean less often

 

[cgullingsrud]

Has anyone loaded this in a 300rum with 220-230 projectiles?

 

[Dark timber]

Has anyone loaded this in a 300rum with 220-230 projectiles?

I have with 230gr Bergers. Wasn’t a super hot load, I think 91-92gr and 3075fps. I’ve since switched to 215’s and it hammers.

 

[High Tech Redneck]

Vihtavouri also recommends against using N570 with heavy loads in temps below -4 degrees Fahrenheit due to increased pressure. Didn’t know this at the time, had an N570 load go out of tune on a hunt in Alberta several years ago due to super cold temps.

Here’s the info from the Vihtavouri website:

Vihtavuori manufactures propellants also for military use and our products are tested according to NATO standards and requirements. Military cartridges are tested in extreme cold conditions down to -54 °C / -65 F. In these extreme minus temperature tests, heavy loads with N570 have shown signs of increased pressure. As safety comes first, we urge the reloading community to strictly adhere to the following safety measure:

Due to risk for high pressure in heavy loads we do not recommend using N570 powder in temperatures below -20 degrees Celsius / -4 degrees Fahrenheit. If using heavy loads in cold temperatures, we recommend using powder N568 instead. All other N500-series powders are safe to use in any temperature also below 0 °C / 32 F.

 

[TradLife406]

Here’s the info from the Vihtavouri website:

Vihtavuori manufactures propellants also for military use and our products are tested according to NATO standards and requirements. Military cartridges are tested in extreme cold conditions down to -54 °C / -65 F. In these extreme minus temperature tests, heavy loads with N570 have shown signs of increased pressure. As safety comes first, we urge the reloading community to strictly adhere to the following safety measure:

Due to risk for high pressure in heavy loads we do not recommend using N570 powder in temperatures below -20 degrees Celsius / -4 degrees Fahrenheit. If using heavy loads in cold temperatures, we recommend using powder N568 instead. All other N500-series powders are safe to use in any temperature also below 0 °C / 32 F.

If it's -20 my butt is at home in the easy chair in front of the fire


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