School me on this plz, I see alot of 1-7 twist on the 556 but not sure how big a difference it makes in a sbr, I'm looking into a 556, 300, and 458 sbr hard to find Info from places I trust thanks.
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I've heard 1:8 is ideal for 300 blackout but not as many out there as there use to be. Seems like you can get 1:7s just about anywhere if they have them in stock. I was looking for a Noveske 8.25" 1:8 twist. But they quit making that barrel. They now have 8.5" 1:7 twist. I'm looking at getting the Rainer Arms 8.5" 1:8 twist now. -
I'm no expert but I would think the shorter the barrel the faster the twist rate needed. A 8.5" barrel with a 1:8 twist will barely get 1 twist before exiting the muzzle. I'd want as much rotation as I could get in a barrel that short. I suspect that a 1:8 twist is so popular for 300BK because MOST people are not shooting it in a 8.5" barrel. I'll bet Noveske quit making that barrel because the twist rate wasn't optimal for that length. JMO.
OP: I'm guessing the twist rate that's "best" depends on the length of barrel AND the caliber AND the bullet weight you intend on shooting - to pick the "optimal" twist rate.Comment
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Barrel length does not have anything to do with twist rate that is needed. You need to decide rate of twist based on the bullet weight you intend to shoot.Comment
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It doesn't matter how many times the bullet spins while it is in the barrel.. Just the speed at which the rotation is started.Originally posted by Horitexan View PostComment
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