Too much twist?

[trapn]

Good day
Im building a 280AI on a rem 700 as a sheep rifle. If i am shooting 140-160 (Max) grain bullet would a 1-10 twist in a 24" Galliard optimum? or should i be going to a 1-9 twist????

Thanks for the help!!!

 

[huntingfamily]

A 1-10 twist should be optimum for the bullet range you are intending to use.
Check this chart out:

ht tp://www.riflebarrels.com/products/caliber_twist_rates.htm

Good day
Im building a 280AI on a rem 700 as a sheep rifle. If i am shooting 140-160 (Max) grain bullet would a 1-10 twist in a 24" Galliard optimum? or should i be going to a 1-9 twist????

Thanks for the help!!!

 

[trapn]

Thanks huntingfamily!!

Thats a great link! Think ill stick with the 1-10 twist. Seems to be the best choice for the caliber of bullet i plan to shoot!!

 

[Jordan Smith]

Definitely go 1:9". What benefit do you think you're getting with the 10" twist?

 

[pete dobinson]

Definitely go 1:9". What benefit do you think you're getting with the 10" twist?

X2 on that, faster rate of twist will stabilize the longer bullets such as 162 gr A-MAX or SST hornady.

 

[AlexF]

Good day
Im building a 280AI on a rem 700 as a sheep rifle. If i am shooting 140-160 (Max) grain bullet would a 1-10 twist in a 24" Galliard optimum? or should i be going to a 1-9 twist????

Thanks for the help!!!

If you get a 1-10 twist, you'll end up with a 270 Win and 160gr Nosler Partition is almost a semi-spitzer!
Get a 1-9 twist so that you can shoot high BC (and long) 160gr bullets when the weather is cold.

Alex

 

[guntech]

In a 7mm; between a 9 or 10 twist the slightly faster twist will not be detrimental even with lighter bullets, and may be a benefit down the road if you ever want to shoot a longer bullet.

 

[Why not?]

I have owned two 280 AIs. Both were 9 twists and both shot everything from 120-175s just fine.

Ted

 

[Boomer]

As a rule I prefer fast twist barrels to slow ones. Any twist rate will stabilize a broad range of bullet lengths, but fast twists tend to stabilize a broader range of bullet lengths than slower twists. Stability is generally an issue twice during the bullet's flight. It tends to yaw upon leaving the muzzle and it yaws again upon contact with a denser than air target. In each case, the bullet from the barrel with the faster twist will recover more quickly, and penetration might even be enhanced all things being equal.

 

[AlexF]

As a rule I prefer fast twist barrels to slow ones. Any twist rate will stabilize a broad range of bullet lengths, but fast twists tend to stabilize a broader range of bullet lengths than slower twists. Stability is generally an issue twice during the bullet's flight. It tends to yaw upon leaving the muzzle and it yaws again upon contact with a denser than air target. In each case, the bullet from the barrel with the faster twist will recover more quickly, and penetration might even be enhanced all things being equal.

You would expect anyone living on the North Pole to favor a faster twist

Seriously, I have people who shoot at high altitude and 25C temperatures tell me that 270 WSM 1-10" is great for 165gr VLD but it simply doesn't work at sea level and 5C temperatures where it needs to work for me, the bullet never fully stabilizes (effective BC drops by 20-25%) and accuracy is lousy.

Don't fool around, get a 1-9" twist which can handle high BC bullet under all hunting conditions.
Simply look at Berger bullets recommended barrel twist and remember that they are computed for maximum accuracy at 1000ft altitude and 59F temperatures.

Alex

 

[trapn]

I appreciate everybody's comments and opinions! I think my best option is to go to a 1-9 twist in the case that i want to shoot a bullet in the 168 grain range!!! Chances are i never will , but you never know....

Thanks