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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A twist on barrel break in question...... Bullet seating depth....
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<blockquote data-quote="Edd" data-source="post: 1441249" data-attributes="member: 30592"><p>This discussion made me curious enough to attempt to add something to my knowledge.</p><p></p><p>On the JGS website there is a recommendation on reamer speeds and feed rates. I'd guess there are many other places that have this information listed but this is the first place I found it.</p><p></p><p>Here is the math showing the slowest and fastest recommended.</p><p></p><p>HSS reamer at 150 RPM's and a .004" per rotation feed is the slowest. Carbide reamer at 400 RPM's and a .006" per rotation is the fastest. They do have some things listed that would cause exceptions.</p><p></p><p>A 308 Winchester chamber is 2.025" deep.</p><p></p><p>Based on this, the slowest time for cutting a chamber would be 3-3/8 minutes and the fastest time would be 50-5/8 seconds.</p></blockquote><p></p>
[QUOTE="Edd, post: 1441249, member: 30592"] This discussion made me curious enough to attempt to add something to my knowledge. On the JGS website there is a recommendation on reamer speeds and feed rates. I'd guess there are many other places that have this information listed but this is the first place I found it. Here is the math showing the slowest and fastest recommended. HSS reamer at 150 RPM's and a .004" per rotation feed is the slowest. Carbide reamer at 400 RPM's and a .006" per rotation is the fastest. They do have some things listed that would cause exceptions. A 308 Winchester chamber is 2.025" deep. Based on this, the slowest time for cutting a chamber would be 3-3/8 minutes and the fastest time would be 50-5/8 seconds. [/QUOTE]
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A twist on barrel break in question...... Bullet seating depth....
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