300 WSM Rate of Twist?

LeePeterson

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Hi! I was wondering if anyone knew what the best rate of twist is for a
300 WSM pumping out 180Gr slugs? I've seen a couple 300WSM rifles with
1 in 10" twist and 1 in 11" twist.

Thanks, Happy Shooting! :D
 
I have shot many rilfes chambered in 300WSM and the majority of the Manufacturers use a 1:10 twist in barrels for this caliber.
The exception is the Sako and Tikka barrels which are all 1:11 rate of twist fopr the 300WSM's.
I did a lot of load development for a Tikka and a Browning and loaded both 150's and 180's for them both.
The Tikka was slightly faster and slightly more consistent/accurate in both bullet wieghts and with all loads. I cannot say this was due to the rate of twist or to the slightly longer barrel or some other reason... I have no way of knowing.
I can say with certainty that the Sako and Tikka's perform very well with the slower twist using 180 grain bullets. The Browning was no slouch either with the faster twist.
 
Post this on the Precision Rifle board. Guys like Leeper and Guntech have made a hell of a lot of target rifles in 30 cal. Don't be surprised to hear that a 12 twist is plenty.
 
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