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Rifles, Reloading, Optics, Equipment
Reloading
Donuts, will they always hinder accuracy?
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<blockquote data-quote="Bob Wright" data-source="post: 1934687" data-attributes="member: 104363"><p>Many Ackley Improved cartridges and wildcats can experience brass flow during forming or resizing. The area of the neck shoulder juction will have a thicker wall causing the neck internally to be smaller in diameter. Seating a bullet into and past this choke point will send pressures up due to slower bullet release. Its not predictable no matter how the neck is sized, so erratic groups. In my case I had 4" jumps in vertical at 200 yards. First time I experienced this.</p><p>So, neck reaming and simultaneous outside neck turning removed it. On my SAAMI spec 280AI, I have to seat any bullet worth hunting with into the case.</p><p>Monitoring to see if it comes back. </p><p>It certainly can be felt at the lower part of the seating stroke.</p><p>I made it to +/- 2fps ES after correcting.</p></blockquote><p></p>
[QUOTE="Bob Wright, post: 1934687, member: 104363"] Many Ackley Improved cartridges and wildcats can experience brass flow during forming or resizing. The area of the neck shoulder juction will have a thicker wall causing the neck internally to be smaller in diameter. Seating a bullet into and past this choke point will send pressures up due to slower bullet release. Its not predictable no matter how the neck is sized, so erratic groups. In my case I had 4" jumps in vertical at 200 yards. First time I experienced this. So, neck reaming and simultaneous outside neck turning removed it. On my SAAMI spec 280AI, I have to seat any bullet worth hunting with into the case. Monitoring to see if it comes back. It certainly can be felt at the lower part of the seating stroke. I made it to +/- 2fps ES after correcting. [/QUOTE]
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Reloading
Donuts, will they always hinder accuracy?
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