5.56 Twist Rate Chart. But getting that level of accuracy out of the rifle youre hopefully building with an 80 lower from scratch means picking the perfect upper - really the barrel matters most - to finish the build. I normally run with a 50200 yard zero on my other 556 weapons.
This twist is found on the M4 carbine the M16A4 the Mk12 Special Purpose Rifle and even the HK416. Good luck finding that in modern semi-autos chambered for 223 Remington ammo or 556 NATO. Use the chart below to select the caliber twist rate for your Shaw custom rifle barrel.
Conventional wisdom says slower twist rates wouldnt properly stabilize a heavy bullet.
Use the chart below to. Like the 308 most twist rates seem to do a pretty decent job. Please refer to the icons in the caliber list to determine which twist rate can be used in your custom barrel. A 18 twist rate would probably be just fine for shooting both super and subs.