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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel lengths vs. Velocity gain/loss
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<blockquote data-quote="SBruce" data-source="post: 479106" data-attributes="member: 21068"><p>There are WAY too many variables going into this to give a straight yes/no answer.</p><p> </p><p>Plain and Simple, depends on too many things! The old rule of thumb is 30-50 fps per barrel inch. But that is so general, it's kinda useless under today's component list.</p><p> </p><p>Powder burn rate, land/groove diameters, twist rate, bullet weight, primers (hot or cool), on and on and on.......... fast barrel, slow barrel, ect...........tight chamber, loose chamber, long throat, short throat......on and on and on.</p><p> </p><p>FWIW, I've owned and shot a few 22-250's with both 24's and 26's. When you're talking 53 grn bullets, the suitable accuracy powders are burning fast enough that it really doesn't matter (yes, generally speaking the 26's shot a little faster than the 24's), enough to matter to a varmint.......NO. </p><p> </p><p>Now change the subject to 69, 75, 80 grn bullets..........different story, that's really where you need the long barrel and slow burning powders. On the same page, include 22-243's, 22 CHeetahs, 220 Swift Improved, 22-6mm's and the like.........again, this is where we need long barrels and slow powders.</p></blockquote><p></p>
[QUOTE="SBruce, post: 479106, member: 21068"] There are WAY too many variables going into this to give a straight yes/no answer. Plain and Simple, depends on too many things! The old rule of thumb is 30-50 fps per barrel inch. But that is so general, it's kinda useless under today's component list. Powder burn rate, land/groove diameters, twist rate, bullet weight, primers (hot or cool), on and on and on.......... fast barrel, slow barrel, ect...........tight chamber, loose chamber, long throat, short throat......on and on and on. FWIW, I've owned and shot a few 22-250's with both 24's and 26's. When you're talking 53 grn bullets, the suitable accuracy powders are burning fast enough that it really doesn't matter (yes, generally speaking the 26's shot a little faster than the 24's), enough to matter to a varmint.......NO. Now change the subject to 69, 75, 80 grn bullets..........different story, that's really where you need the long barrel and slow burning powders. On the same page, include 22-243's, 22 CHeetahs, 220 Swift Improved, 22-6mm's and the like.........again, this is where we need long barrels and slow powders. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel lengths vs. Velocity gain/loss
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