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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.243Win 55HH How Fast?
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<blockquote data-quote="Calvin45" data-source="post: 2678916" data-attributes="member: 109862"><p>Oh I totally understand what you're up to with the varget burn rate as well haha. My point was simply that it's certainly not even remotely wishful thinking to believe a .243 can drive a 55 to well north of 4000 without being wildly overpressure. </p><p></p><p>Bullet geometry like what hammers use (and there are others - gs custom hv drive band for example)</p><p></p><p>Progressive burn rate powders (rl26, superformance, rl 17, for examples)</p><p></p><p>Bullet coatings - and honestly mostly just HBN (moly, ws2, lubalox all have some merit but not much compared to hbn)</p><p></p><p>All these things do change the game and it's specifically in avoiding a massive initial spike upon the bullet entering the lands i beleive that allows for more total gas volume to be generated behind a projectile without exceeding a certain pressure ceiling at any point. Greater total area under the curve. </p><p></p><p>To my mind there's still room to really explore other possibilities too. Gain twists, slight choke bores, and polygonal rifling all seem worthy of experimentation.</p></blockquote><p></p>
[QUOTE="Calvin45, post: 2678916, member: 109862"] Oh I totally understand what you’re up to with the varget burn rate as well haha. My point was simply that it’s certainly not even remotely wishful thinking to believe a .243 can drive a 55 to well north of 4000 without being wildly overpressure. Bullet geometry like what hammers use (and there are others - gs custom hv drive band for example) Progressive burn rate powders (rl26, superformance, rl 17, for examples) Bullet coatings - and honestly mostly just HBN (moly, ws2, lubalox all have some merit but not much compared to hbn) All these things do change the game and it’s specifically in avoiding a massive initial spike upon the bullet entering the lands i beleive that allows for more total gas volume to be generated behind a projectile without exceeding a certain pressure ceiling at any point. Greater total area under the curve. To my mind there’s still room to really explore other possibilities too. Gain twists, slight choke bores, and polygonal rifling all seem worthy of experimentation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.243Win 55HH How Fast?
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