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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistic gelatin vs twist rate
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<blockquote data-quote="trickytune" data-source="post: 987320" data-attributes="member: 69289"><p>Cant find much info on this but someone must have tested. Lets assume a .223 with the exact same projectile, velocity etc fired through a 1:12" twist vs a 1:8" twist I would like to see results in gelatin. My thoughts are the faster twist would help expansion over the slower twist. This may then affect penetration. Is this why some people have little expansion with some projectiles and others have good expansion? Sectional density is calculated on a bullet before it hits the target but once expansion starts it will obviously change. So a harder projectile that expands less but has lower initial sd will likely penetrate deeper than the bullet with greater sd that expands more easily. Obviously this requires you to match the bullet to the target.</p></blockquote><p></p>
[QUOTE="trickytune, post: 987320, member: 69289"] Cant find much info on this but someone must have tested. Lets assume a .223 with the exact same projectile, velocity etc fired through a 1:12" twist vs a 1:8" twist I would like to see results in gelatin. My thoughts are the faster twist would help expansion over the slower twist. This may then affect penetration. Is this why some people have little expansion with some projectiles and others have good expansion? Sectional density is calculated on a bullet before it hits the target but once expansion starts it will obviously change. So a harder projectile that expands less but has lower initial sd will likely penetrate deeper than the bullet with greater sd that expands more easily. Obviously this requires you to match the bullet to the target. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Ballistic gelatin vs twist rate
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