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Thread: .224 With 14" Twist
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January 22nd, 2022, 06:49 AM #1Member
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.224 With 14" Twist
What's been your experience with heavier bullets in a 14" twist?
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January 22nd, 2022, 08:26 AM #2Grand Member
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Re: .224 With 14" Twist
I used an early m16 (serial number 609) at a machine gun training class at Fort Dix in Feb. Temps were around 0 degrees and m193 ball ammo was keyholing at 25 meters.
The gun shot fine in warmer temps. 1/14 is not a good choice for anything over about 40 grains.Crusader's local #556 South Central Asia chapter
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January 22nd, 2022, 09:00 AM #3
Re: .224 With 14" Twist
Have a 22/250, 1-14, that took me down the rabbit hole finding what I wanted.
That 22/250, with my loads, would shoot some 55's maybe ok, and others poorly. Over that was a real crap shoot.
I took conventional wisdom of certain weights for certain twists a step further.
I learned that weight was only one consideration.
A few decent articles on it: http://bulletin.accurateshooter.com/...&submit=SearchIt ain't what they call you, it's what you answer to.
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January 22nd, 2022, 09:14 AM #4
Re: .224 With 14" Twist
As Cephas alluded to in the thread above, it's length, not mass of the bullet, but the mass and length are tied together by the diameter of the bullet. However, where the mass is distrubuted within the long axis of the bullet can make a difference, too. For example, a hollow point with the mass concentrated at towards the rear may tend to be unstable if the rifling twist is too slow.
IME, 40 gr and some 45 gr .224 bullets shot fine in 1:14 twist. I could not get 50s or 55s to do so.
NoahWisdom and knowledge shall be the stability of thy times.
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January 22nd, 2022, 06:43 PM #5
Re: .224 With 14" Twist
Hyper-velocity .224 chamberings typically have 1:14" twist. .220Swift, .22-250, .225Win, .224Wby, etc.
Their velocity makes up for the slower twist with most bullet lengths.
Two things determines proper twist rate: bullet length and velocity. Slower of a given length bullet, the faster you must spin it. The faster you push it, the less twist you need.
If your gun is chambered in .222Rem, .222RemMag, .223Rem, or some other "slower" cartridge, you'll probably be limited to 50-55gr bullet lengths or less due to velocity. If one of the hyper-velocity cartridges, you may find that the 69-72gr lengths do just fine.RIP: SFN, 1861, twoeggsup, Lambo, jamesjo, JayBell, 32 Magnum, Pro2A, mrwildroot, dregan, Frenchy, Fragger, ungawa, Mtn Jack, Grapeshot, R.W.J., PennsyPlinker, Statkowski, Deanimator, roland, aubie515
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January 23rd, 2022, 10:12 AM #6Super Member
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Re: .224 With 14" Twist
Just look at the history of the 6MM Remington and you will understand. I got a cheap .244 Remington barrel and put it on an Arisaka action. I had to load 100 grain RN flat based bullets to get it to "Deer accuracy" at 100 yards.
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September 25th, 2022, 10:06 PM #7Member
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Re: .224 With 14" Twist
Yeah, works the same way with Speer's .224 diameter 70 grain round nose.
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September 26th, 2022, 10:30 AM #8Active Member
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September 26th, 2022, 08:19 PM #9Grand Member
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September 26th, 2022, 08:23 PM #10Grand Member
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Re: .224 With 14" Twist
Heard that too. The US Army did not care for subzero performance of the original M16. Accuracy and stability suffered.
The HK series of firearms kept the 1/14 twist. The Germans wanted to retain lethality. They would later adopt the "spoon point" bullet for the G36 prototypes in the 1970s. Something to do with an analysis of small arms strikes - they noted that most people were struck in the arms and legs. So they wanted more "effectiveness". Germans take warfare seriously.
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