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Rifles, Reloading, Optics, Equipment
Reloading
Twist Rate Effect on Load Data
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<blockquote data-quote="Bullet bumper" data-source="post: 779698" data-attributes="member: 17844"><p>That is difficult to say exactly. </p><p>Generally a faster twist will increase pressure a small amount all else being equal .</p><p>With factory ammo I can't see that the extra twist will do any harm especially using the longer heavier bullets that may need the extra stability . With very light short bullets in a fast twist you may see some extra precession at long range . </p><p>When you reload you are watching the pressure signs anyway and you stop at a sensible load point anyway . </p><p>Don't think the 223 has enough powder room to push them too hard but stay away from varmint grenades and very light explosive bullets . </p><p>When you have a certain twist rate you should stay with the bullet length and type that suits the twist rate give or take but in the ballpark .</p><p>If twist rates were a big factor on safe pressures then the load manuals would be quoting twist rates too .</p><p>Just develop a safe load to suit your gun and don't worry too much about what anybody else is doing as it may not be suitable to your gun .</p><p>Wether a bullet blows up or not is governed by many factors and you don't know until you run the load /gun combination . </p><p>Some of the factors in bullet blow up are.</p><p>High pressures for cartridge , High velocities for cartridge , Long barrels , rough barrels , deep "cut rifling " , thin bullet jackets , over hard or very soft bullet jackets , light weight bullets , bullet rotational instability , loose bullet cores , hot burning powders , fast twist rates , tight bore diameters .</p><p>Put some of them together and the bullet can explode in the air . </p><p>However it would be extremely rare to see so many faults or circumstances in one gun.</p><p>Some old Berger bullets were blowing up due to thin jackets , high velocities , deep cut rifling , long barrels , rough barrels , tight bores. Thicker jackets fixed the issue.</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 779698, member: 17844"] That is difficult to say exactly. Generally a faster twist will increase pressure a small amount all else being equal . With factory ammo I can't see that the extra twist will do any harm especially using the longer heavier bullets that may need the extra stability . With very light short bullets in a fast twist you may see some extra precession at long range . When you reload you are watching the pressure signs anyway and you stop at a sensible load point anyway . Don't think the 223 has enough powder room to push them too hard but stay away from varmint grenades and very light explosive bullets . When you have a certain twist rate you should stay with the bullet length and type that suits the twist rate give or take but in the ballpark . If twist rates were a big factor on safe pressures then the load manuals would be quoting twist rates too . Just develop a safe load to suit your gun and don't worry too much about what anybody else is doing as it may not be suitable to your gun . Wether a bullet blows up or not is governed by many factors and you don't know until you run the load /gun combination . Some of the factors in bullet blow up are. High pressures for cartridge , High velocities for cartridge , Long barrels , rough barrels , deep "cut rifling " , thin bullet jackets , over hard or very soft bullet jackets , light weight bullets , bullet rotational instability , loose bullet cores , hot burning powders , fast twist rates , tight bore diameters . Put some of them together and the bullet can explode in the air . However it would be extremely rare to see so many faults or circumstances in one gun. Some old Berger bullets were blowing up due to thin jackets , high velocities , deep cut rifling , long barrels , rough barrels , tight bores. Thicker jackets fixed the issue. [/QUOTE]
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Reloading
Twist Rate Effect on Load Data
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