Author Topic: Twist rate for 22-250?  (Read 1011 times)

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Offline grouper sandwich

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Twist rate for 22-250?
« on: January 16, 2004, 09:07:20 AM »
I want to buy a 22-250 and the only brand that I can find, outside of a custom rifle (ain't happening), that has a 1:12 rate is Savage.  Is there much difference in the 1:12 and 1:14 twist rates with regards to stabilizing bullets up to 70 grains?  Does the extra two inches make much difference?  Would an extra inch of barrel help compensate for the slower rate?  Any and all help is appreciated.

Offline Blackhawk44

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Twist rate for 22-250?
« Reply #1 on: January 16, 2004, 12:13:49 PM »
Yes it will.  From a number of articles in the past, on average in a .224 bore with cartridge capacities from 22 Hornet thru about 220 Swift, 1-16 will only stabilize up to about 45 grain bullets, 1-14 about 50gr, 1-12 around 55gr, 1-10 up to about 63gr flatbased and blunt 70gr.  For the very pointy, boat tailed 62-68gr target bullets at least a 1-9 is needed.  The VLD 75-80gr spears take a 1-7.  The length of the bullet does more to dictate twist rate rather than simply weight.  Length of the barrel (and therefore increased velocity), technically, does have an added effect, but its contribution is so minor that it has to be disregarded.  The only way to gain enough velocity to contribute anything to increasing the bullets stability through a given twist rate is to increase the amount of powder burned, ie, case capacity.  Again, its overall contribution is minor enough that simply getting another barrel with a faster twist is cheaper and easier in the long run.