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Long Range Hunting & Shooting
Sand bags or bipod for load development
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<blockquote data-quote="Wallie" data-source="post: 1572704" data-attributes="member: 107256"><p>Slightly different topic from consistent tracking during recoil, which seems to be cover pretty well already. </p><p>Harmonics matter! They aren't usually addressed directly, because generally harmonics are static rather than variable, but harmonics are exactly what every handloader attempts to optimize! </p><p>Specifically, tracking the muzzle as it vibrates around in specific relation to the exact instant the bullet exits. The goal wether we realize it or not is to develop a load that takes advantage of a momentary pause as the muzzle oscillates around. Think of a sine wave, and the flat/horizontal sections of at the tops and bottoms of the wave as pauses ideal for bullet exit, and the steep sections in between as rapid muzzle movement or inaccurate/inconsistent timing for bullet exit. </p><p>Everyone takes for granted that heavy rifles and heavy barrels are more accurate, and pencil barrels are harder to dial in, but the reason is harmonics. A heavy tuning fork with lots of mass (and rigidity) vibrates less than a thin light one, and makes the sine wave of muzzle oscillation flat and gentle, while a low mass pencil barrel with low rigidity flexes and oscillates acutely with a steep high frequency sine wave. </p><p></p><p>This is exactly why putting your rifle in a lead sled, and effectively adding its mass to your rifle, is a horrible idea specifically for load development. The whole idea is to optimize the harmonics of your rifle, not a lead sled (unless you ALWAYS shoot with the lead sled attached... then, carry on!)</p><p></p><p>Unless you get really lucky and your lead sled modified harmonics just happens to coincide with normal/un-modified harmonics, you will get results similar to Deputy819. </p><p></p><p></p><p>Of course as CAV2108 and FIGJAM note, consistent shooting ability is a prerequisite for meaningful load development. But developing a load optimized for your 40lb lead slead/rifle assembly is counterproductive.</p></blockquote><p></p>
[QUOTE="Wallie, post: 1572704, member: 107256"] Slightly different topic from consistent tracking during recoil, which seems to be cover pretty well already. Harmonics matter! They aren’t usually addressed directly, because generally harmonics are static rather than variable, but harmonics are exactly what every handloader attempts to optimize! Specifically, tracking the muzzle as it vibrates around in specific relation to the exact instant the bullet exits. The goal wether we realize it or not is to develop a load that takes advantage of a momentary pause as the muzzle oscillates around. Think of a sine wave, and the flat/horizontal sections of at the tops and bottoms of the wave as pauses ideal for bullet exit, and the steep sections in between as rapid muzzle movement or inaccurate/inconsistent timing for bullet exit. Everyone takes for granted that heavy rifles and heavy barrels are more accurate, and pencil barrels are harder to dial in, but the reason is harmonics. A heavy tuning fork with lots of mass (and rigidity) vibrates less than a thin light one, and makes the sine wave of muzzle oscillation flat and gentle, while a low mass pencil barrel with low rigidity flexes and oscillates acutely with a steep high frequency sine wave. This is exactly why putting your rifle in a lead sled, and effectively adding its mass to your rifle, is a horrible idea specifically for load development. The whole idea is to optimize the harmonics of your rifle, not a lead sled (unless you ALWAYS shoot with the lead sled attached... then, carry on!) Unless you get really lucky and your lead sled modified harmonics just happens to coincide with normal/un-modified harmonics, you will get results similar to Deputy819. Of course as CAV2108 and FIGJAM note, consistent shooting ability is a prerequisite for meaningful load development. But developing a load optimized for your 40lb lead slead/rifle assembly is counterproductive. [/QUOTE]
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