Originally Posted by Huntz
Originally Posted by djpaintless
Originally Posted by William_E_Tibbe
Dempsey:
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<br>There are some other interesting facts and consequences of spinning bullets.
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<br>* The twist rate in most rifles is actually not suited for the full range of grain weights available. True
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<br>* The twist rate is only one element of determining the numbers of revolutions . True<br>
<br>* The velocity also governs the rpm's. True
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<br>* The twist rates for bigger bullets are slower than those of smaller bullets. FALSE! Heavier bullets require FASTER twists to properly stabalize them i.e in 223 you need a 1/7 or 1/8 to stabilize the heavier 80gr bullets, a slower 1/12 won't work with them.<br>
<br>* Small bullets spun too fast will shed their cladding and disintegratre due to excessive centrifugal force. True - I've seen them do it.<br>
<br>* Bullet spin rate has been related to penetration depth in animals! FALSE! The rotational inertia of a bullet is a very small fraction of the total energy of a bullet and is unrelated to penetration depth.
<br>
<br>Bill Tibbe


...........................DJ


Depends on what the meaning of bigger bullets is.If being bigger means larger dia.Then the answer of a slower twist is correct.


No, it depends on the weight of a bullet and the velocity it's driven at. You need a faster twist barrel to shoot 300gr 338cal bullets out of a 338 Lapua for another example.
In the heavier calibers recoil limits the velocity you are going to drive the heavier bullets but the twist rate is still a function of how fast you drive what weight of bullet and sometimes form factors not by it's diameter........................DJ

Remember this is all supposed to be for fun.......................