300 Win Mag and N570

[Iron Worker]

I was shooting 208 ELDms from my new 300 Mag. C.O A.L 3.500. 79.5 grs N570 Fed 215 primers. I was getting over MOA at 100yds, and the EXT spread was 100FPS(2,839-2,942) and SD about 60. That isn't very good. Even so, I could hit the gongs at 300-400 yds. 10" rifling twist Bergara B-14 HMR. What could be the cause?

 

[Dmagna]

I have found that N570 doesn't like to under pressure. You will get crazy numbers until you hit a load that makes consistent pressure. Has done that in my win mag, lapua, prc and others I have used it in. I don't know the barrel length but you should be at 3000 fps with a 208 with a 26" barrel with n570.

 

[Iron Worker]

I have found that N570 doesn't like to under pressure. You will get crazy numbers until you hit a load that makes consistent pressure. Has done that in my win mag, lapua, prc and others I have used it in. I don't know the barrel length but you should be at 3000 fps with a 208 with a 26" barrel with n570.

Thanks,very helpful. 26" bbl

 

[Elk Hunter 338]

If that doesn't tune in get some h1000 and cci 250 mags .. This combo is made for the 300 WM

 

[Iron Worker]

If that doesn't tune in get some h1000 and cci 250 mags .. This combo is made for the 300 WM

I have those component's Thanks

 

[Lefty7mmstw]

v570 is working well in my 300 win with the 200 elx-x, but she's slow... I was only getting 2600 fps from a 24" bbl. I forget the charge but it was Vit. data for a 300win with 200 gr pills