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#3330044 - 08/21/13 05:18 AM 1:8 vs. 1:9 twist rate
MUP
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Registered: 08/01/07
Posts: 46480
Loc: Just North of Chatt-town

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Talking about 5.56/.223 calibers. What grain recommendations for each TR do you guys recommend? I've been shooting 55gr BTSP from my 1:9, but now have a 1:8 barrel and was wondering what change I should accommodate for. Thanks in advance!
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#3330068 - 08/21/13 06:12 AM Re: 1:8 vs. 1:9 twist rate [Re: MUP]
EastTNHunter
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Registered: 03/08/10
Posts: 3131
Loc: Rhea Co., TN

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You don't have to worry about overstabilization as much as understabilization. In other words, you don't have to make a change unless you wnat to, as long as you aren't shooting 40 or 45gr bullets. The 55s should be fine, but with that twist you can go up to 70gr or so if you would like, depending on the bullet...
I have a 1:9 and shoot 65gr SGKs very well... Well, my gun shoots them very well \:\)

Gimme a call if you have any ?s


Edited by EastTNHunter (08/21/13 06:13 AM)

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#3330223 - 08/21/13 08:21 AM Re: 1:8 vs. 1:9 twist rate [Re: MUP]
DaveB
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Registered: 09/03/08
Posts: 4764
Loc: Shelby County

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Might see a difference in accuracy or point of impact. The faster twist rate means you can stabilize heavier/longer bullets. 55's will shoot fine and I believe that TR will go up to close to 80 grains.
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#3330250 - 08/21/13 08:38 AM Re: 1:8 vs. 1:9 twist rate [Re: DaveB]
MUP
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Registered: 08/01/07
Posts: 46480
Loc: Just North of Chatt-town

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10-4 Thanks guys! ;\)
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MUP

Amateurs: Built the Ark

Professionals: Built the Titanic

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