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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Rifling twist in Artillery cannons
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<blockquote data-quote="Bart B" data-source="post: 568711" data-attributes="member: 5302"><p>Most tank's main gun barrels were rifled with a 1 in 15 to 1 in 20 calibers. A caliber being the bore diameter. Field artillery barrels had about the same twist. Compared to battleship main battery barrels from 12 to 16 inch bores with a 1 in 20 to 1 in 25, they're pretty fast. But a battleship's 2000 to 3000 pound, 6-foot long projectiles didn't need to be spun so fast; they spin stabilized very well at a slower twist.</p><p></p><p>Virtually all millitary large caliber barrels were broach rifled. A single pass of the hydraulic operated rifling machine was all it took. Some were made by a single-point cutter that made several passes in each groove which took a long time.</p><p></p><p>6 inch and larger naval gun barrels had their rifling in a liner that, when worn out, would be pushed out its back end then replaced with another liner. 'Twas much cheaper and faster than replacing the entire barrel. I don't know of any tank or artillery barrels that used liners.</p></blockquote><p></p>
[QUOTE="Bart B, post: 568711, member: 5302"] Most tank's main gun barrels were rifled with a 1 in 15 to 1 in 20 calibers. A caliber being the bore diameter. Field artillery barrels had about the same twist. Compared to battleship main battery barrels from 12 to 16 inch bores with a 1 in 20 to 1 in 25, they're pretty fast. But a battleship's 2000 to 3000 pound, 6-foot long projectiles didn't need to be spun so fast; they spin stabilized very well at a slower twist. Virtually all millitary large caliber barrels were broach rifled. A single pass of the hydraulic operated rifling machine was all it took. Some were made by a single-point cutter that made several passes in each groove which took a long time. 6 inch and larger naval gun barrels had their rifling in a liner that, when worn out, would be pushed out its back end then replaced with another liner. 'Twas much cheaper and faster than replacing the entire barrel. I don't know of any tank or artillery barrels that used liners. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Rifling twist in Artillery cannons
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