round for 1in14 twist


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dreammaster74
July 8, 2006, 04:08 PM
i have a rem 700 22-250 1in14 twist and 26in bll. what grain should i use.

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rangerruck
July 8, 2006, 05:25 PM
50 grn or less should do nicely, you may make 55, but i would see it to believe it , first.

buttrap
July 9, 2006, 07:05 AM
55s do just fine out of my 26 inch 1-14 twist gun.

dreammaster74
July 9, 2006, 07:49 AM
thanks

dreammaster74
July 18, 2006, 12:48 AM
tried win 45s much tighter at 100

mljdeckard
July 18, 2006, 02:51 AM
My dad uses 55s in the exact same rifle, I'll have to look at 45s.

Jim Watson
July 18, 2006, 09:17 AM
MY .22-250 1 in 14" shoots 60 grain flatbase spitzers very well, thank you. It also shoots the 70 grain Speer semipointed well enough for its intended purpose.

There are two common misconceptions about rifling twist current on the Net.
One is that rifling twist - bullet matchups are very selective and restrictive. Actually they are very flexible as long as the bullet is stabilized at all.
The other is that the Greenhill formula applies closely to smallbore spitzers.

Byron
July 18, 2006, 01:14 PM
I have a 222 with a 1in14 twist.It is unerving the accuracy from Hornady's 55 grain SP. Byron

CB900F
July 18, 2006, 10:37 PM
Fella's;

Keep in mind that the ability to stabilize a bullet for a given caliber & twist is not only dependant upon the bullet weight, but also the velocity of the bullet.

900F

Henry455
July 20, 2006, 12:16 PM
I have always heard its more dependent on bullet LENGTH than weight.

Vern Humphrey
July 20, 2006, 12:31 PM
I have always heard its more dependent on bullet LENGTH than weight.

That's correct. The Greenhill forumla is Twist = (bullet diameter^2 X 150)/bullet length. While this is really just an emperical rule-of-thumb, it's right for most small arms calibers, over most velocities.

In this case, we have 14=(.224^2 X 150)/bullet length. Or 14 = 7.5264/bullet length. Bullet length =7.5264/14.

So bullet length could run up to a half inch or so.

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