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Rifles, Reloading, Optics, Equipment
Reloading
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<blockquote data-quote="Alan Griffith" data-source="post: 648657" data-attributes="member: 4686"><p>I had been using the .289" bushing which gave me .001" neck tension. 7mmRHB suggested a tighter bushing, saying my groups might tighten up with around .004" neck tension. I happened to have the two next smaller bushings so what I posted is the results of the test. A side result was the increased heat test. </p><p></p><p>I was shooting at 65 Deg F but I'm not sure it matters. Keep the barrel as close to ambient temp as possible. I was shooting the "cold" groups with 2-3 min between shots. The "warm" temps about 1 min apart and the "hot" temp groups as fast as I could run the bolt, reacquire the target and squeeze the trigger.</p><p></p><p>Alan</p></blockquote><p></p>
[QUOTE="Alan Griffith, post: 648657, member: 4686"] I had been using the .289" bushing which gave me .001" neck tension. 7mmRHB suggested a tighter bushing, saying my groups might tighten up with around .004" neck tension. I happened to have the two next smaller bushings so what I posted is the results of the test. A side result was the increased heat test. I was shooting at 65 Deg F but I'm not sure it matters. Keep the barrel as close to ambient temp as possible. I was shooting the "cold" groups with 2-3 min between shots. The "warm" temps about 1 min apart and the "hot" temp groups as fast as I could run the bolt, reacquire the target and squeeze the trigger. Alan [/QUOTE]
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