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Is a 1/8 twist barrel good?

The 1:8 twist barrel is the most versatile of the bunch. This twist rate gives you the most flexibility, effectively stabilizing projectiles up to 80 grains but not over stabilizing lighter ammunition. The 1:9 barrel is best for stabilizing lighter and mid-weight bullets ranging between 45 and 77 grains.

What grain bullet is best for a 1 in 7 twist?

1-in-7 Inches Twist Rate This barrel will stabilize bullets of up to 90 grains, and can handle the 70- to 77-grain bullets at just about any velocity, which makes it well suited for carbines with very short barrels. If you want a Mil-Spec clone, the 1-in-7 twist is the way to go.

What twist rate for 5.56 is best?

The 1:9, 1:8 and 1:7 are popular twist rates that will stabilize most . 223/5.56 ammunition.

What’s the best twist rate for 223?

The 1:12 is perfect for lightweight 55-grain bullets, which constitute the majority of practice and plinking . 223 ammunition. However, most modern carbine barrels shorter than 20 inches feature faster twist rates, so shooters wanting a 1:12 should stick to the old-school 20-inch rifle pipe.

What is the best twist for AR-15?

Most modern AR-15 barrels will come in three twist rates: 1:9, 1:8, and 1:7. The 1:9 barrel is best for stabilizing lighter and mid-weight bullets between 45 and 77 grains. The 1:8 twist barrel is the most versatile of the bunch, the perfect option for16-inch carbine AR-15 (the most common configuration on the market.)

What 5.56 ammo is best for a 1 7 twist?

Lastly, the 1:7 twist barrel is the “mil-spec” choice, as the U.S. military adopted this setup in the 1980s for its M16A2 rifle running a 62-grain M855 5.56 round.

What is the best barrel twist for an AR-15?

What grain 5.56 does the military use?

The 5.56×45mm NATO SS109/M855 cartridge (NATO: SS109; U.S.: M855) with standard 62 gr. lead core bullets with steel penetrator will penetrate about 38 to 51 cm (15 to 20 in) into soft tissue in ideal circumstances. As with all spitzer shaped projectiles, it is prone to yaw in soft tissue.

Can You single feed with a 1-7 twist?

With a 1-7″ twist you can stabilize heavier/longer bullets, but you run out of room to feed them through a magazine. But, you can single feed them, if you work up a load with the bullet to or into the lands.

Which is better a higher twist rate or lower twist rate?

Higher number twist rates perform better with lighter grain bullets, while lower number twist rates perform better with heavier grain bullets. Common wisdom for 5.56 NATO and .223 Rem. indicates those barrels with a rate of rifling at 1:9 or slower (1:10 etc.), in general, perform best with lighter bullets—60 grains or less.

Why does a rifling twist need to be faster?

With newer types of bullets on the market and lead-free designs, some bullets made of copper and zinc are very light but require extra length to achieve the same weight compared to a lead core projectile. So, the longer the bullet you shoot, generally speaking, the faster the rifling twist needs to be to properly stabilize the bullet in flight.

What does a 1 : 7 rifling rate mean?

Industrywide shorthand, expressed as 1:7, 1:8, etc., describes gun-barrel rifling rate. The first figure indicates one full rotation of the bullet, followed by the number of barrel-travel inches (in the United States, anyway) required for its completion. A 1:7 twist means the bullet turns a full 360 degrees every seven inches of barrel.