What Grain Bullet Is Best for 1 in 8 Twist

By fu_Kaitlyn434 21 Apr, 2022 Post a Comment

The 17 twist rate for 300 blackout is the most popular one as it can be used for matches and self-defense. We refer to it as one rotation over a particular inch of barrel.

Pin On Gun Stuff And Shooting

1-7 was only used by the military to stabilize a LONGER specialty bullet M856 tracer ammunition not available to civilians anyhow.

. The high BC they have on the box is from a 17 twist. Only show this user. In cartridges like the Valkyrie with muzzle velocities above 2650 fps a 1x7 twist barrel will stabilize the bullet correctly.

The only bullets that a 1-8 twist wont stablize in a 556 wont fit in a magazine and arent commercially available as loaded ammunition. IME any weight from there up shoots well in a 18 65 Creedmoor. The 18 is a sub MOA all day long while the 19 is MOA.

Use only 62-69 grainers in both. 3040 24515. If youre looking for a general-purpose workmanlike utility player that pleasantly gobbles up anything thrown its way 18 is a solid choice.

You can shoot 85gr Sierras if you want. 8208 should work very well with any of those bullets. 3040 24515.

Ive been told 17 is the best for a 75 Gr. Hope this helps ya. For a 16-inch general-use carbine the 1-in-8 twist is about as versatile as it gets.

While bullets heavier than 150 grains are available the rifle would have to have a barrel with a 185 twist rate to properly stabilize the bullet in flight. But our militarys M4 carbine comes stock with a 17 twist barrel and the standard M193 556 cartridge has a 55 grain bullet. Did the government do that to purposefully play a prank on our soldiers.

The 18 using the GMM is a 500-700 yard shooter while the 19 can only reliably reach 300 yards. Dont be afraid to try the 130s-140s. The 270 with the right load and grain bullet is a decent flat shooting caliber.

Its not like a 22-250 shooting thin jacket 40gr bullets at 4000 fps where you have to twist it slow enough to not blow up bullets. Kind of related but maybe a little off topic. Sierra recommends a 65 twist barrel for the 9290 22 cal 90 gr HPBT bullet when pushed at muzzle velocities lower than 2650 fps.

I have a buddy who has a 18 twist 20 inch and once he gets past 62 his groups start spreading. As I recall about 5 fps per inch of twist less velocity. They said no problem.

Indicates those barrels with a rate of rifling at 19 or slower 110 etc in general perform best with lighter bullets60 grains or less. Basically anything from 55 grain or a bit lighter up to rounds with projectiles too long to fit into an AR magazine. Barrel Twist How many inches per turn is your rate of rifling twist.

Most AR-15 upper 300 Blackout rifles feature the 17 and 18 twist rate which is the rifle barrels spin rate. Its a very good powder. 1-in-8 Inches Twist Rate.

The one I have is an 18 18 inch and Ive stabilized 55gr 69gr and 77gr bullets. 1-8 is probably a better twist for an AR than 1-7 anyhow. I was looking at the 30 Cal Hornady ELD-M 225g.

Shoot PPU and Gold Medal Match 69 gr the most. Thats 8 inches of barrel for the 300 BLK 1-8. It will stabilize pretty much any bullet weight.

People worry too much about twist rate with light bullets in a cartridge like this. With a 1-7 twist rate for instance it means that the bullet will be spun once over 7 inches of rifling. I have 2 rifles with a 1 in 8 twist and they will shoot everything I get excellent accuarcy and no troubles at all with 77 gr they also shoot 55gr quite well.

This number is used along with other inputs to determine the stability and related trajectory metrics. Contacting Ruger for a 17 for the SR556. We could design and build a 180-grain 65mm bullet and shoot it from a 15 twist barrel but velocity would be anemic and getting it to shoot well would be difficult.

1-in-8 Inches For a 16-inch general-use carbine the 1-in-8 twist is about as versatile as it gets. For example a 17 rate of twist is arguably more lower than what is needed to stabilize a 55 grain projectile. The 18 twist rate on the other hand is well-suited for range shooting and match rounds.

For example a 45 457 caliber rifle with a twist rate of 1 in 18 should be able to stabilize a bullet up. I emailed Hornady Technical Support and asked if this bullets would hold up in a 300 Win Mag with a 17 Twist. Both loads are 223 Rem and the 62 gr are M855 Green tipped 556x45mm.

I have two 19 twist rifles one with 16 inch barrel one with 20. This twist rate will comfortably stabilize bullets up to 80-grains and the excellent 75- and 77-grain bullets also work great at a wider spectrum of velocities which means barrel length isnt critical. We are having really good luck with the 145 ELD-Xs in a 1-8 if you dont need the 170s.

So all depends if you want light bullet with lots of velocity or a heavier bullet with knock down power. Examples are the 65mm Creedmoor and 65mm PRC where most factory and custom barrels are 18 twist he said. The 1 in 8 twist is an ideal twist for all the ammo that will feed a223 AR IMHO.

Both of these guns love 55 grain. When I build another 300 Win Im planning on using an 18 Twist. KWCAM Jan 6 2011.

Common wisdom for 556 NATO and 223 Rem. Using them will allow you to estimate the heaviestlongest bullet a gun will stabilize based on the caliber left-most column and twist rate in inches top-most row. The 18 twist is like the unicorn barrel twist.

It is deemed to be a universal twist as it can control bullets in an AR pretty well. If necessary you could even try bullets in the 60 or 50 gr weight range. Your 8-twist barrel is not so fast a twist rate so as to preclude the use of bullets less than 70 gr in weight.

Typical value for this input is between 17 and 113. I have found that the 1-8 twist does a better job of stabilizing the 150 gr bullets as well as the 170s. It is a good match for substantial subsonic rounds.

This twist rate will comfortably stabilize bullets up to 80-grains and the excellent 75- and 77-grain bullets also work great at a wider spectrum. A barrel with a 18 twist rate is quite versatile and should be able to shoot just about anything except perhaps very lightly jacketed and low mass varmint rounds and tracer rounds.

Pin On Stuff