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Rifles, Reloading, Optics, Equipment
Reloading
How to match powder to barrel length?
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<blockquote data-quote="QuietTexan" data-source="post: 2440557" data-attributes="member: 116181"><p>People put on longer barrels because it's very easy to show consistent, substantial, and repeatable gains in velocity by increasing barrel length holding other features (chambering, bullet weight, powder, etc) constant. This is all a balancing game. You can also gain velocity holding everything thing else constant by increasing case capacity. But that introduces variability of efficiency, and changes recoil profiles significantly.</p><p></p><p>Do you want fast and soft? Go longer barrel, which typically ends up with heavier rifle. Do you want light and fast? It's going to kick. Do you want absolute precision? Choose an efficient design that isn't necessarily practical for reliable feeding. So many variables to fit so many goals.</p><p></p><p>Also impacts load tuning. Since longer barrels nearly always gain velocity in a sane range, it's an expedient way of finding a faster velocity node.</p><p></p><p>If you absolutely need to get a certain bullet to 3000 FPS, your options could be - 300 RUM in 18", 300 WM in 22", 30-06AIN in 26", 308 in 28". Stack a weight limit or barrel length preference on the velocity target, and one guy might want an 18" 300 RUM when another guy shooting off a bench would be happy with a 30" 30-06AI. The 18" RUM is undoubtedly going to be significantly less pleasant to shoot than a 30-06, doubly so if it weighs 6# compared to 18#.</p><p></p><p>But to be fair you've tumbled in to asking one the most important questions when it comes to picking a chambering - pick something designed to do what you want? Or beat a square peg into a round hole? Longer barrel is round peg/round hole stuff, works pretty much every time, tradeoffs in most cases are limited increased length and weight, not a lot that can go wrong with adding barrel length, and if it does it's easy to rectify by chopping and crowing the barrel.</p><p></p><p>[ATTACH=full]340499[/ATTACH]</p><p>[URL unfurl="true"]https://precisionrifleblog.com/2015/06/09/how-much-does-it-matter-overall-summary/[/URL]</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2440557, member: 116181"] People put on longer barrels because it's very easy to show consistent, substantial, and repeatable gains in velocity by increasing barrel length holding other features (chambering, bullet weight, powder, etc) constant. This is all a balancing game. You can also gain velocity holding everything thing else constant by increasing case capacity. But that introduces variability of efficiency, and changes recoil profiles significantly. Do you want fast and soft? Go longer barrel, which typically ends up with heavier rifle. Do you want light and fast? It's going to kick. Do you want absolute precision? Choose an efficient design that isn't necessarily practical for reliable feeding. So many variables to fit so many goals. Also impacts load tuning. Since longer barrels nearly always gain velocity in a sane range, it's an expedient way of finding a faster velocity node. If you absolutely need to get a certain bullet to 3000 FPS, your options could be - 300 RUM in 18", 300 WM in 22", 30-06AIN in 26", 308 in 28". Stack a weight limit or barrel length preference on the velocity target, and one guy might want an 18" 300 RUM when another guy shooting off a bench would be happy with a 30" 30-06AI. The 18" RUM is undoubtedly going to be significantly less pleasant to shoot than a 30-06, doubly so if it weighs 6# compared to 18#. But to be fair you've tumbled in to asking one the most important questions when it comes to picking a chambering - pick something designed to do what you want? Or beat a square peg into a round hole? Longer barrel is round peg/round hole stuff, works pretty much every time, tradeoffs in most cases are limited increased length and weight, not a lot that can go wrong with adding barrel length, and if it does it's easy to rectify by chopping and crowing the barrel. [ATTACH type="full" width="464px" alt="1644682519158.png"]340499[/ATTACH] [URL unfurl="true"]https://precisionrifleblog.com/2015/06/09/how-much-does-it-matter-overall-summary/[/URL] [/QUOTE]
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How to match powder to barrel length?
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