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If I get a barrel with a 1/12 twist, can I still shoot cheap ammo (223)?
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Then, Sir, we will give them the bayonet! (Stonewall Jackson's reply to Colonel B.E. Bee when he reported that the enemy were beating them back. At the first battle of Bull Run, July 1861)
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Retired Navy CPO -
you should be good to fire M193 ammo (55gr FMJBT bullets)
that twist rate will not stableize some ammo (like SS-109 - 62gr)
http://www.ammo-oracle.com/body.htm <--- good info thereOriginally posted by KestryllOriginally posted by TKMOriginally posted by Click Boom -
yeah 1/12 is really only good for 55gr and lower. Many of the bench shooters like using 1/12. Why I don't know, but they have told me that anything above 55gr and its shoots like crap."Calling an illegal alien a "undocumented worker" is like calling the drug dealer hanging around outside your kid's school an "unlicensed pharmacist."Comment
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55gr and lower, yesOriginally posted by rod
I'd rather have a faster twist, like 1/9 and shoot 55gr FMJ, then they explode inside soft targets out to about 150yds, lol.
JPComment
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Thanks. I'm building something for long range shooting from a bench and wasn't too sure on the twist issue.sigpic
Then, Sir, we will give them the bayonet! (Stonewall Jackson's reply to Colonel B.E. Bee when he reported that the enemy were beating them back. At the first battle of Bull Run, July 1861)
VCDL Member
Retired Navy CPOComment
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long range get faster twist 1:8 or 1:7 and run 62 grain ammoOriginally posted by rodComment
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The more common 1:9" twist will stabilize the 70 grain and lighter bullets. Pay the extra for the 1:8" or 1:7" twist if you're going to shoot heavier than 70 grain bullets.Originally posted by five.five-sixFrank
One rifle, one planet, Holland's 375
Life Member NRA, CRPA and SAFComment
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I guess I'm a little confused....ok, a lot confused. I was thinking that a 1/12 twist would provide more spin and stabilize a bullet better than a 1/8 or 1/9 twist. Am I backwards?sigpic
Then, Sir, we will give them the bayonet! (Stonewall Jackson's reply to Colonel B.E. Bee when he reported that the enemy were beating them back. At the first battle of Bull Run, July 1861)
VCDL Member
Retired Navy CPOComment
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You are backwards.Originally posted by rod
1/12 = one revolution every 12"
1/7 = one revolution every 7"
Therefore, for a given length of barrel, the 1/7 twist will spin a bullet at much higher rpms than the same bullet shot out of a 1/12.
A faster twist is needed for longer projectiles. Longer projectiles are needed to make heavier bullets in a given caliber and material.Last edited by paradox; 11-29-2006, 10:49 AM.* Freedom is the human right to live your life however you damn well please, so long as you don't interfere with another's right to do the same.
* "Don't believe them, don't fear them, don't ask anything of them." --Alexander SolzhenitsynComment
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That makes perfect sense. Thanks for making me smarter.
I was under the impression that 1/7 meant that there were 7 twists for every inch.sigpic
Then, Sir, we will give them the bayonet! (Stonewall Jackson's reply to Colonel B.E. Bee when he reported that the enemy were beating them back. At the first battle of Bull Run, July 1861)
VCDL Member
Retired Navy CPOComment
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at that rate, the bore would be THREADED, not rifled...Originally posted by rodOriginally posted by KestryllOriginally posted by TKMOriginally posted by Click BoomComment
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Yeah, I know. Kinda silly isn't it. I'm smarter now though.sigpic
Then, Sir, we will give them the bayonet! (Stonewall Jackson's reply to Colonel B.E. Bee when he reported that the enemy were beating them back. At the first battle of Bull Run, July 1861)
VCDL Member
Retired Navy CPOComment
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