What twist barrel would work best for 55 and 70 grain .243 bullets. In a 6creed/243 rifle. Thanks

I have a 6mm BR rifle with a 1 in 14" twist. It will stabilize 55 through 70 grain bullets very well. I picked a 14" twist as the rifle is a varmint gun and shots are under 400 yards for the most part. I would not pick that twist again. However, I would not recommend that slow a twist. I would go with a 1 in 9" twist. It's hard to over stabilize a bullet, but easy to have too slow a twist.

better to over twist than under twist

with 6BR velocities...........

8-9 twist with prob no chance of spinning jackets of the bullets

years ago...my 6XC 8T/3G

would spin jackets off the 75 V max

but not the 87 V

Yeah the 1-8"twist 3 groove barrels were a major debacle for me in several rifles...........never again !!!!!!!!!

As for the OP, if you are not going to shoot heavier than 70gr bullets.........1-12" twist 4,5 or 6groove barrel

I picked up a Howa 1500 6creed from a member on here and thinking it’s a 7.5 twist. I may pick up a Tikka 243 for the kids and not 100% sure but kinda thought they were 10 twist. Just looking at what bullets I have and what I’m finding in stock. I thought loading some 55-70gr for this summer for prairie dogs (mainly use the 22’s and 17’s)

Didn’t know if that 7.5 would work at all with the 70’s

the 55 ballistic tips do real good in an 8 twist.

the 55 ballistic tips do real good in an 8 twist.

If you're sticking to the 55-70gr bullet weight range, a 1:14 is the best twist. It will be too slow for most bullets heavier than 75 grains.

The best way to pick a twist rate is to consider the longest, heaviest bullet you will ever shoot, and pick the optimum twist for that bullet. All the lighter, shorter bullets will shoot just fine in nearly all cases.

I built a 243 with a 1in 12 twist. Worked great with 70 grain bullets. Never tried anything smaller. Hasbeen

14" twist with 70 BT's in a 6x47 Lapua......

I would do an 8, or I wouldn't do a .243....of course, I would rather shoot 70s from a .22 than a .24.

Why would you limit yourself with a 14" twist? You might want to shoot a longer bullet some day.

Not being intentionally snarky, just don't understand the reasoning.

I am of the same opinion...

My dad shot bench rest rifles at targets and varmints for many years toward the end of his life. He used 6mm rifles and small 6mm cartridges and 1:14 twist barrels, using bullets from 60-75 grains. Some guys just want to shoot the light bullets. If that's the case, a 14-twist is the best twist. He shot lots of .1's.

Why would he do that??

You prevented me from asking the same question. Never say never.

^^^^^This. Short and simple. BTDT multiple times.

Food for thought......

In my 6x47 Lapua switch barrel, comparing the 70 grain BT load in the 14" twist, to the 105 Berger load in the 8" twist, they run neck & neck to 550 yards, before the Berger starts taking over.

Faster rotation causes greater precession and nutation when asymmetries exist in the bullet. This was especially important in decades passed, as bullets were not balanced as well as they are today. With the quality of today's bullets, the negative impact of faster twist on precision is not nearly as large as it used to be. Bullets still aren't perfect, so for BR purposes an excessively fast twist might be a hindrance, but for the rest of us there is no downside to a faster-than-needed rate of twist.