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Rifles, Reloading, Optics, Equipment
Reloading
Changing primer improved accuracy by 1.5MOA is that even possible?
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<blockquote data-quote="Mikecr" data-source="post: 1735423" data-attributes="member: 1521"><p>It's big enough that re-working a load per primer may be called for.</p><p></p><p>Muzzle velocity itself means less to actual tune because bullet accelerations are not linear, and less consistent than velocities.</p><p>Picture a narrow timing window at the muzzle. If the bullet releases well in the window it hits near POIx. Slightly out of window = POIr,y,z, etc.. It helps if the bullet spends a consistent amount of time through this window. Enough to path align with POIx.</p><p>If the bullet is playing catch up, over accelerating to/through this window, it will likely release less consistently. Even while it reached same MV.</p><p>QuickLoad makes this stuff easier to see.</p><p></p><p>Shorter barrels create less dispersion. You might want the shortest barrel that you can consistently manage tune with, and meeting all other needs with chosen bullet. But longer barrels are easier to tune, and that actual tune is far easier to see.</p><p>For a relatively large cartridge like 280AI, I would want a ~28" barrel. I would pick a powder that burns up <u>inside</u> that barrel. And with that I would know when things are right -vs- wrong.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1735423, member: 1521"] It's big enough that re-working a load per primer may be called for. Muzzle velocity itself means less to actual tune because bullet accelerations are not linear, and less consistent than velocities. Picture a narrow timing window at the muzzle. If the bullet releases well in the window it hits near POIx. Slightly out of window = POIr,y,z, etc.. It helps if the bullet spends a consistent amount of time through this window. Enough to path align with POIx. If the bullet is playing catch up, over accelerating to/through this window, it will likely release less consistently. Even while it reached same MV. QuickLoad makes this stuff easier to see. Shorter barrels create less dispersion. You might want the shortest barrel that you can consistently manage tune with, and meeting all other needs with chosen bullet. But longer barrels are easier to tune, and that actual tune is far easier to see. For a relatively large cartridge like 280AI, I would want a ~28" barrel. I would pick a powder that burns up [U]inside[/U] that barrel. And with that I would know when things are right -vs- wrong. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Changing primer improved accuracy by 1.5MOA is that even possible?
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