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Rifles, Reloading, Optics, Equipment
Reloading
Ladder testing at 1k- Detailed article and video
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<blockquote data-quote="Bart B" data-source="post: 1724026" data-attributes="member: 5302"><p>A given barrel's harmonics, actually its resonant (lowest, several dozen Hz) frequency and several harmonic (higher, up to several thousand Hz) frequencies, are fixed and don't change from the shock of firing. The rigidity of the steel doesn't change as it heats up from firing a few dozen shots fired once every 20 to 30 seconds. Or 10 shots once every 5 or 6 seconds.</p><p></p><p>If your shots start walking away from point of aim as the barrel heats up, it's not stress relieved or fit correctly to the receiver face.</p><p></p><p>Buckreed, you'll need to do another test. Different powders can produce the same velocity but bullets will probably leave at different angles on the muzzle axis due to barrel time changes. Ideally, the slower ones will leave on the muzzle up swing at a slightly higher angle from the LOS than faster ones. Shoot at least 5 shots per charge weight.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1724026, member: 5302"] A given barrel's harmonics, actually its resonant (lowest, several dozen Hz) frequency and several harmonic (higher, up to several thousand Hz) frequencies, are fixed and don't change from the shock of firing. The rigidity of the steel doesn't change as it heats up from firing a few dozen shots fired once every 20 to 30 seconds. Or 10 shots once every 5 or 6 seconds. If your shots start walking away from point of aim as the barrel heats up, it's not stress relieved or fit correctly to the receiver face. Buckreed, you'll need to do another test. Different powders can produce the same velocity but bullets will probably leave at different angles on the muzzle axis due to barrel time changes. Ideally, the slower ones will leave on the muzzle up swing at a slightly higher angle from the LOS than faster ones. Shoot at least 5 shots per charge weight. [/QUOTE]
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Reloading
Ladder testing at 1k- Detailed article and video
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