I'm loving this N570 powder. 73.2 grs behind 115, Berger is averaging 3.326 with an SD of 5.1 and an Extreme spread of 14.2. All out of 26"Bartlein bbl. Shot these in 50-degree weather, with zero pressure signs. I wonder how they would do in 80-degree weather?
257 WBY Mag and N570
- Thread starter Ironworker
- Start date
Zero pressure signs,100yds. There is room for more powder. It's fast enough now.
Beruisis
Silver $$ Contributor
ironworker, what is your twist rate?
Thanks.
10" Twist rate
Alex Wheeler
Site $$ Sponsor
N570 is majic. If its an appropriate powder for what your loading it most likely have the best accuracy and velocity. I never fought it over temp swings. Id bet your load is very mild. Id be surprised if you didnt have another node higher. Just work up slowly.
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