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Rifles, Reloading, Optics, Equipment
Reloading
Neck tension
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<blockquote data-quote="VinceMule" data-source="post: 3064306" data-attributes="member: 122164"><p>I got 300 firings each on 30 pieces of Lapua Palma bass formed to 6 XC, annealing every 5th firing. Of the 30 pieces, 12 are still going strong. The rest I ruined shooting R#17 with 108g bergers at 3250 fps. grouping amazing with the RAS Tuner/Brake. The case necks are turned with .003 clearance.</p><p></p><p>On the other hand, I just retired a factory Rem 25/06 where I shot the barrel out with 100 pieces of Winchester blue bag brass shooting 87s at 3500-3600 fps with R#19. I got 12 firings on the brass without annealing, and some necks were starting to split. I never full length sized the brass the entire 1200 rounds, just bumped the shoulder back with a Forster standard neck sizer.</p><p></p><p>There is an amazing difference in various makes of brass, and often different lot # of brass, such as the older Winchester brass over time.</p><p></p><p>The hardest brass I have seen is Hertenberger 308 Match brass, and various calibers of brass from RWS.</p><p> </p><p>Back in the Mid 80s, we shot out 6 PPC benchrest barrels with 50 pieces of Sako 220 Russain brass. Nobody ever annealed, and neck clearance was usually .002,.001, and many of us ran .0002 no clearance necks for a while where brass spring back held the bullets in place(this did not prove to be the most accurate as you can imagine, but it was the RAGE for a while).</p><p></p><p>Alloy content of the brass, and neck clearance are critical issues. The more you work the brass, the more you need to anneal. Lately, the talk hear a lot of is the preaching of Bullet Release Issues where you need .004+ clearance on the neck, resulting in uniform bullet release. I cannot argue with this theory, but annealing will be a must. Brass spring back is always evident, the more the neck expands and gets sized back, the more spring back will be an issue where annealing will be critical for uniform bullet grip</p></blockquote><p></p>
[QUOTE="VinceMule, post: 3064306, member: 122164"] I got 300 firings each on 30 pieces of Lapua Palma bass formed to 6 XC, annealing every 5th firing. Of the 30 pieces, 12 are still going strong. The rest I ruined shooting R#17 with 108g bergers at 3250 fps. grouping amazing with the RAS Tuner/Brake. The case necks are turned with .003 clearance. On the other hand, I just retired a factory Rem 25/06 where I shot the barrel out with 100 pieces of Winchester blue bag brass shooting 87s at 3500-3600 fps with R#19. I got 12 firings on the brass without annealing, and some necks were starting to split. I never full length sized the brass the entire 1200 rounds, just bumped the shoulder back with a Forster standard neck sizer. There is an amazing difference in various makes of brass, and often different lot # of brass, such as the older Winchester brass over time. The hardest brass I have seen is Hertenberger 308 Match brass, and various calibers of brass from RWS. Back in the Mid 80s, we shot out 6 PPC benchrest barrels with 50 pieces of Sako 220 Russain brass. Nobody ever annealed, and neck clearance was usually .002,.001, and many of us ran .0002 no clearance necks for a while where brass spring back held the bullets in place(this did not prove to be the most accurate as you can imagine, but it was the RAGE for a while). Alloy content of the brass, and neck clearance are critical issues. The more you work the brass, the more you need to anneal. Lately, the talk hear a lot of is the preaching of Bullet Release Issues where you need .004+ clearance on the neck, resulting in uniform bullet release. I cannot argue with this theory, but annealing will be a must. Brass spring back is always evident, the more the neck expands and gets sized back, the more spring back will be an issue where annealing will be critical for uniform bullet grip [/QUOTE]
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