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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning
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<blockquote data-quote="Hugnot" data-source="post: 2810225" data-attributes="member: 115658"><p>This is now being considered because I plan to get a new 6.5 PRC barrel.</p><p></p><p>Some photos of dummy rounds being attached to project for chamber conformation.</p><p></p><p>[ATTACH]459890[/ATTACH]</p><p></p><p>[ATTACH]459891[/ATTACH]</p><p></p><p>[ATTACH]459892[/ATTACH]</p><p></p><p>These are some Hornady 6.5 PRC range brass (like free) that I have had for about 1 year. Observe the neck diameter is .290 +- .001 using caliper measurement. Observe the necks have not been completely turned down. The necks were sized with a unaltered Forster F/L die with expander, then expanded with a Lee .262 mandrel, then .264 bullets were seated. Neck wall thickness = .290 - .264 = .026 or .026/2 = .013 neck wall. Two other dummy rounds were assembled, all indicate partially turned down necks. Complete neck turning for uniform neck wall thickness with loaded round necks would make for diameters of .289. Turning necks down to .288 would still provide adequate neck tension & less work hardening & neck wall thicknesses of .012.</p><p></p><p>Do I think neck turning is needed? Yes - Necks show diameter/radius variations. Different brass lots may have thicker neck walls. Brass neck walls thicken with brass flow. Neck turning reduces neck wall thickness & reduces work hardening with unaltered factory F/L dies. Expander button not needed for F/L sizing with turned necks.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2810225, member: 115658"] This is now being considered because I plan to get a new 6.5 PRC barrel. Some photos of dummy rounds being attached to project for chamber conformation. [ATTACH alt="IMG_1926 (1).JPG"]459890[/ATTACH] [ATTACH alt="IMG_1927 (1).JPG"]459891[/ATTACH] [ATTACH alt="IMG_1928 (1).JPG"]459892[/ATTACH] These are some Hornady 6.5 PRC range brass (like free) that I have had for about 1 year. Observe the neck diameter is .290 +- .001 using caliper measurement. Observe the necks have not been completely turned down. The necks were sized with a unaltered Forster F/L die with expander, then expanded with a Lee .262 mandrel, then .264 bullets were seated. Neck wall thickness = .290 - .264 = .026 or .026/2 = .013 neck wall. Two other dummy rounds were assembled, all indicate partially turned down necks. Complete neck turning for uniform neck wall thickness with loaded round necks would make for diameters of .289. Turning necks down to .288 would still provide adequate neck tension & less work hardening & neck wall thicknesses of .012. Do I think neck turning is needed? Yes - Necks show diameter/radius variations. Different brass lots may have thicker neck walls. Brass neck walls thicken with brass flow. Neck turning reduces neck wall thickness & reduces work hardening with unaltered factory F/L dies. Expander button not needed for F/L sizing with turned necks. [/QUOTE]
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Reloading
Neck turning
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