25 Creedmoor

[Tmadding]

Looking at building a 25 Creedmoor with a 24” Carbon Fiber barrel. Option for twist are dependent on manufacturer. Current offerings from one is only 1/7.5 the other is 1/7 or 1/7.5 with lengthy waiting periods. When figuring everything on Berger’s twist rate calculator I maintain over 1.5 SG with either.
Thoughts?
TIA

 

[nm.otter]

SAAMI spec is 1:7.5 and works with 138gr A-tips. Is there a projectile out there that actually needs 1:7?

 

[SlimCreaper25]

Unless you plan to shoot coppers like McGuire 134, go with a 7.5.