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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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<blockquote data-quote="Bart B" data-source="post: 1130575" data-attributes="member: 5302"><p>I think the increase in muzzle velocity was caused by you holding the rifle tighter against your shoulder than before. An 80 to 90 fps spread in average muzzle velocity acrôss several folks shooting the same rifle and ammo easily demonstrates this.</p><p></p><p>A .003" spread in factory match ammo bullet seating depths is normal. Same spread in case head clearance to the bolt face across all rounds when they're fired. All of which means there is a .006" spread in bullet jump to the rifling. Yet the best of it shoots 1/4 MOA at short range.</p><p></p><p>If your gauge doesn't contact the bullet at the diameter it touches the rifling, it doesn't mean much.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1130575, member: 5302"] I think the increase in muzzle velocity was caused by you holding the rifle tighter against your shoulder than before. An 80 to 90 fps spread in average muzzle velocity acrôss several folks shooting the same rifle and ammo easily demonstrates this. A .003" spread in factory match ammo bullet seating depths is normal. Same spread in case head clearance to the bolt face across all rounds when they're fired. All of which means there is a .006" spread in bullet jump to the rifling. Yet the best of it shoots 1/4 MOA at short range. If your gauge doesn't contact the bullet at the diameter it touches the rifling, it doesn't mean much. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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