shaocaholica
Member
My gun is still at the shop so I can't read its markings right now. Not even sure if the twist is marked on it. Does anyone know what the twist rate is for the 243 and if they made changes to it throughout its production?
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SAAMI specifications for the 243 Win is a 1 in 10 twist. That will stabilize bullets up to the 105 grain Speer at 243 velocities. Heavier and/or longer VLD bullets may require a custom barrel with a faster twist. No one "changes twist throughout production" once the SAAMI standard has been established. BTW, SAAMI stands for Small Arms & Ammunition Manufacturers Institute. It's the industry's agree to standard for making chambers, barrels & ammo. You may want to look into it. Some good info there!! The only barrels I am aware of that have the twist stamped on them would be custom barrels that have a different twist than SAAMI specs.
So what is it that elicits your concern with twist?
Just curious because I couldn't find any mention of it in the literature or articles on them. I know of SAMMI but I'm not that versed with what they do and I wasn't aware they publish twist rate spec. I'm more used to hearing, "this twist goes with this weight" not "all chamberings for X must have Y twist to be 'in-spec'".
Being overly concerned or obsessed with twist rate & it's affect on accuracy is like a dog chasing it's tail. So many things contribute to any particular rifle's accuracy that singling out twist rate as being a dominate force is kind of foolhardy. As Stonecreek pointed out, "fads" come & go. For decades benchrest shooters have believed that the slowest twist possible to stabilize a bullet provided the best accuracy potential. Now, all the gun gurus writing for the mags, preach that the faster the twist, the better. Seems to be a contest going on over who can spin a bullet the fastest. Who should we believe, the guys actually shooting at targets & comparing the results or the guys writing about it??? A bullet is either stable or it isn't & I'm incapable of determining what the "perfect" twist for a particular bullet is as some experts claim to be able to do. Me thinks there is some Kool-Aid drinking going on with the current "twist rate" fad followers.