What kind of barrel does an AR 10 have?īudget AR makers Palmetto State Armory recently released a new AR-10 upper receiver chambered in the long range 7mm-08 cartridge. 2.015 inches-but maintains the same 20-degree shoulder of the. The 7mm-08 case is just slightly longer than the parent. MudRunner2005 said: 1:9 twist will be fine up to 180gr bullets. What is the best twist rate for a 7mm 08? Both cartridges have a similar trajectory, but the 7mm-08 retains more kinetic energy than the 6.5 Creedmoor at typical hunting ranges while the 6.5 Creedmoor has less recoil. The 6.5 Creedmoor fires smaller diameter and more aerodynamic bullets than the 7mm-08 Remington. Rifles for the 7mm-08 are usually short, light and handy, and the cartridge makes a great choice for a mountain rifle. 308 Winchester, the 7mm-08 can be seriously accurate, with most rifles at or inside of 1-MOA, and. The 162 grain Hornady A-max is an immensely useful all round bullet, performing well at both close and long ranges on light to medium weight game. The 160-162 grain bullet weight is very useful in the 7mm08 providing bullet construction is matched to game weights. They won’t suffer much from barrels down to 18″ either. Short cartridges that fire fast, relitively light bullet weights won’t really benefit enough from a barrel that is much longer.

That 24″ barrel will be both easy handling and have a very optimal burn time for the 7mm-08.

3 What kind of barrel does an AR 10 have?Īctive member.

2 Which is better 7mm 08 or 6.5 Creedmoor?.

1 What is the best barrel length for 7mm-08?.

In 6.5 Creedmoor, 1:9 twist barrels are intended for bullet weights up to 130 grains, and 1:8 twist barrels are intended for bullets weighing 130 grains or more. 308 Winchester range from 1:12 twist (best for 168 to 170 grain bullets) to 1:10 twist (best for 170 to 220 grain bullets). In general, faster or tighter twist rates are intended to stabilize heavier bullets at lower velocities, with less twist rate needed for lighter bullets traveling at higher velocities.

Although barrel twist is matched with bullet weight for easy reference, the ideal twist rate depends on a variety of factors including bullet weight, how much length of the bullet engages the rifling, bullet velocity, and more.

If the 1:8 barrel is 16 inches long, the bullet will spiral like a football two full times before leaving the muzzle.īarrel twist rate determines the range of bullet weights that the barrel will stabilize best for optimal accuracy. This is measured by how many inches of barrel the bullet will travel through before it completes one 360-degree revolution.Ī twist rate of 1:8 means that the rifling (and the bullet passing through it) twists 360 degrees in eight inches of barrel length.

7mm 08 ar10 barrel