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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Re-chamber for 7RM Question...
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<blockquote data-quote="Innovative" data-source="post: 1548127" data-attributes="member: 527"><p><strong>Crazyhorse . . . .</strong></p><p></p><p>You're right that case neck thickness does vary. Case necks can also thicken as brass migrates forward at almost every firing. However, these increases are in the realm of ten thousandths of an inch. Measure the neck diameter on one of your fired cases, and you will be looking at the exact neck diameter of your chamber. Then measure the diameter of your handloads. The difference is your neck clearance. (Watch your decimal point when measuring things.) </p><p></p><p><strong>AZShooter . . . . .</strong></p><p></p><p>You are right that case necks can be too tight. I once had to purchase another reamer with a larger diameter neck to solve the problem. Tight necks are not a problem if the handloader wants to neck turn cases. In fact, if you neck turn your case necks for a tight neck chamber, it will always produce a more accurate rifle. Just ask any BR shooter. </p><p></p><p>However, for the handloader who absolutely doesn't want to neck turn, <strong>.</strong>002" to <strong>.</strong>003" is probably a better way to go. I wouldn't go larger than that expecting to get maximum accuracy.</p></blockquote><p></p>
[QUOTE="Innovative, post: 1548127, member: 527"] [B]Crazyhorse . . . .[/B] You’re right that case neck thickness does vary. Case necks can also thicken as brass migrates forward at almost every firing. However, these increases are in the realm of ten thousandths of an inch. Measure the neck diameter on one of your fired cases, and you will be looking at the exact neck diameter of your chamber. Then measure the diameter of your handloads. The difference is your neck clearance. (Watch your decimal point when measuring things.) [B]AZShooter . . . . .[/B] You are right that case necks can be too tight. I once had to purchase another reamer with a larger diameter neck to solve the problem. Tight necks are not a problem if the handloader wants to neck turn cases. In fact, if you neck turn your case necks for a tight neck chamber, it will always produce a more accurate rifle. Just ask any BR shooter. However, for the handloader who absolutely doesn’t want to neck turn, [B].[/B]002” to [B].[/B]003” is probably a better way to go. I wouldn’t go larger than that expecting to get maximum accuracy. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Re-chamber for 7RM Question...
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