Zastava 375 H%H twist rate?

[vpsalin]

Does anyone know what the twist rate is on late production Zastava 375 H&H?

 

[4fifty8]

Got Zastava 375 H&H full stock 1:14 according to this source. https://www.habitatafrica.co.za/product/zastava-m70-american-style-375-h-h-magnum/

Also 1:14 this source: https://www.davesheer.com/specials/zastava-m70-375-h-h/

 

[Meroh]

Put a brush on a cleaning rod, put a mark on the rod, pull it through until the mark has made a complete revolution. Measure the distance. Distance = twist.

 

[vpsalin]

Got Zastava 375 H&H full stock 1:14 according to this source. https://www.habitatafrica.co.za/product/zastava-m70-american-style-375-h-h-magnum/

Also 1:14 this source: https://www.davesheer.com/specials/zastava-m70-375-h-h/

Does this affect the performance in any way? I was reading that standard should be 1:12 ??

 

[4fifty8]

375 H&H std twist rate 1:12 300gr Woodleigh stabilize just fine good accuracy in my 1:14 Zastava.

 

[mikeyb]

Yeah, the bigger the diameter the less impact twist rate will have on stability, to an extent. My .223 9-twist likes 69gr Sierra and 75gr Hornady, but 77gr Sierra or heavier groups like a shotgun pattern. But a 14-twist .35 Whelen will group 310gr Woodleighs as well as a 12-twist. I used to think I wanted more than 10-twist on my .30 cal rifles but my Model 70 in .30-06 shoots 205gr Berger Elites just fine.

 

[4fifty8]

Berger twist rate stability calculator predicts full stability/optimal bc with 1:14 twist & .375 Woodleigh 300gr RN@2400 fps mv/6000' elev/39F. https://bergerbullets.com/twist-rate-calculator/