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Tennessee Gun Owners Forums
Reloading
Why are velocity nodes so important?
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<blockquote data-quote="jlanecr500" data-source="post: 5105991" data-attributes="member: 16430"><p>Basically, the vibration or wave that is caused when the primer fires, travels back and forth from breech to muzzle. The barrel diameter at any given point is largest when the wave is there so we want the wave near the breech when the bullet exits the muzzle. So, with this wave traveling back and forth, the bullet might exit the muzzle on the 4th cycle of the wave for one node. But if we increase our charge which speeds up the bullet, the bullet could exit on the 3rd cycle of the wave on the next node. So, this explains what I meant when I said that I hit 3 different nodes with the same bullet and powder but with different charge weights. Beyond this, all we really need is the node list and Quick Load software, along with bullet/powder/barrel length/brass water weight in grains/desired powder to calculate loads that get us real close to the node and prepares us for ladder or OCW testing. Below is the barrel time list.</p><p>[ATTACH=full]73371[/ATTACH]</p></blockquote><p></p>
[QUOTE="jlanecr500, post: 5105991, member: 16430"] Basically, the vibration or wave that is caused when the primer fires, travels back and forth from breech to muzzle. The barrel diameter at any given point is largest when the wave is there so we want the wave near the breech when the bullet exits the muzzle. So, with this wave traveling back and forth, the bullet might exit the muzzle on the 4th cycle of the wave for one node. But if we increase our charge which speeds up the bullet, the bullet could exit on the 3rd cycle of the wave on the next node. So, this explains what I meant when I said that I hit 3 different nodes with the same bullet and powder but with different charge weights. Beyond this, all we really need is the node list and Quick Load software, along with bullet/powder/barrel length/brass water weight in grains/desired powder to calculate loads that get us real close to the node and prepares us for ladder or OCW testing. Below is the barrel time list. [ATTACH type="full" alt="Screenshot_20210511-235457_Adobe Acrobat.jpg"]73371[/ATTACH] [/QUOTE]
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Tennessee Gun Owners Forums
Reloading
Why are velocity nodes so important?
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