Just wondering what bullet wieght shooters have had the best result with in this twist?
And out of curiosity how does it do with light rounds?
And out of curiosity how does it do with light rounds?
Range Report .308 - 1 in 10" twist...
- Thread starter Sooter76
- Start date
How light is light? Are we talking 150gr FMJ's or 110grainers?
I've had great success with the Nosler CC 168 BT but that's as light as I've went. My 1-10 Criterion likes the Berger 185 Juggs best but will shoot 168-190s fine. Bullets have been scarce for the last year or more so I've used what I could find.
Let's say 150gr.
That seems like a really fast twist for 150s.
I know Berger recommends a 15 twist for their 150 Flat Base.
I know Berger recommends a 15 twist for their 150 Flat Base.
I don’t see you having that big of a problem, they may not shoot as tight as your used to with heavier bullets. Then again you may not see a difference at all. I too have not run anything lighter than 168 in my 1:10 twist and my 1:12 shoots the 155’s fine.
FWIW and I know it's 30-06 but the M1 Garand was designed to fire a 150 FMJ flatbase projectile out of a 1/10 twist 24" barrel and they shoot a projectile just fine.
I'm actually building a light bullet .30 cal right now, and Boots Obermeyer suggested a 13 twist for 168 and 175, as does Berger. He said he's gone as slow as 14 with 190 Sierras.
Speaking of 30-06, Boots said,
"The 10 twist in the 30-06 came from the 1890's and the 30-40 krag shooting 220's. They never changed the twist until after WW2 and the .308 came out."
