1 12 twist vs 7 - Search
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  2. A barrel with 1:12 rifling is a slow twist, meaning it takes 12 inches for the groove to make a full rotation. Said another way, a bullet must travel through the barrel 12 inches before it spins one complete rotation. A 1:7 twist is faster — one rotation in 7 inches — and applies more spin to the bullet.
    gundigest.com/rifles/ar-15/choosing-right-ar-barrel-twist
    gundigest.com/rifles/ar-15/choosing-right-ar-barrel-twist
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  3. People also ask
    What does a 1 7 twist mean?A 1:7 twist means the bullet turns a full 360 degrees every seven inches of barrel. Nine inches of travel for each rotation gives the barrel a 1:9 rifling rate. Some European manufacturers indicate distance in metric units, usually centimeters.
    What is a 1 7 twist rate?A 1:7 twist rate means one full turn every 7 inches of barrel length, while a 1:9 twist rate means one full turn every 9 inches. The legendary Eugene Stoner, creator of the M16, initially designed the rifle with a slower twist rate of one full turn every 14 inches and four grooves. But as ammunition and requirements evolved, so did the twist rates.
    What is the difference between a 1 8 twist and a 1:10 twist?For example, a 1:8 twist will spin the bullet one revolution in 8 inches, whereas a 1:10” twist will spin a bullet one revolution in 10 inches. If you were shooting a bullet in both barrels at a velocity of 2800 feet per second, the 1:8” twist barrel (252,000 RPM) will spin a bullet much faster than a 1:10” twist barrel (201,600 RPM).
    What is a 1 in 12 twist barrel?The 1 in 12 inch twist is ideal for best accuracy with varmint weight bullets (70-85 grains) in a high velocity .24 (6mm) caliber rifle. The heaviest spitzer bullet that a .244 with a 1 in 12 inch twist barrel could stabilize was 90 grains. .243 Winchester barrels, on the other hand, were rifled 1:10" to stabilize bullets as heavy as 105 grains.
     
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    WEBMay 16, 2023 · A 1:7 twist rate means one full turn every 7 inches of barrel length, while a 1:9 twist rate means one full turn every 9 inches. The legendary Eugene Stoner, creator of the M16, initially designed the rifle …

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    WEBAug 3, 2020 · A 1:7 twist means the bullet turns a full 360 degrees every seven inches of barrel. Nine inches of travel for each rotation gives the barrel a 1:9 rifling rate. Some European manufacturers indicate distance …

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    WEBSep 19, 2019 · Although it’s possible to find an AR with a slower 1:12 rate, it’s pretty rare. Most modern, short-barreled AR-15s come in three basic twist rates: 1:7, 1:8, and 1:9. If you want a mil-spec rifle, the 1:7 barrel …

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    WEBSep 11, 2022 · Initially standardized with a 62-grain bullet, 5.56 NATO rifles have a much faster 1:7-inch twist rate.

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