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Rifles, Reloading, Optics, Equipment
Reloading
Is it possible for the bore and the chamber to be non-concentric ?
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<blockquote data-quote="Radman" data-source="post: 2897041" data-attributes="member: 112033"><p>One thing I see us straying away from (me included) as this post evolves is chamber vs barrel concentricity.</p><p></p><p>Most often they're straightening what shippers & materials-handling people have bent (cold) by either wrapping one sling around the center of a bundle of bar stock and the ends bend down or the load is slung near the two ends & the center swags down. I've seen it in industries for years. Either way the steel gets bent COLD & some manufacturers straighten it COLD so there is no heat involved so far. That comes later down the line. </p><p>Either way, it wasn't stipulated, just stating that barrel makers don't straighten barrels. </p><p>Try drilling a hole through a warped broom handle. Even if clamped perfectly square in a lathe, after it's released you'll still have a bowed broom handle (or gun barrel). Straightening before machining is the only way to assure a truer barrel. (I can't imagine trying to to cut bollard rifling in an untrued barrel)</p><p>We haven't even discussed cold hammer-forged barrels, (which are also great), & gotten way off original topic of barrel/chamber concentricity, which is what this was originally about. </p><p>I am not here to attack a particular brand or to force my opinion. I just know that (good) barrel makers DO straighten barrels if needed. To do that for mass production is incredible.</p></blockquote><p></p>
[QUOTE="Radman, post: 2897041, member: 112033"] One thing I see us straying away from (me included) as this post evolves is chamber vs barrel concentricity. Most often they're straightening what shippers & materials-handling people have bent (cold) by either wrapping one sling around the center of a bundle of bar stock and the ends bend down or the load is slung near the two ends & the center swags down. I've seen it in industries for years. Either way the steel gets bent COLD & some manufacturers straighten it COLD so there is no heat involved so far. That comes later down the line. Either way, it wasn't stipulated, just stating that barrel makers don't straighten barrels. Try drilling a hole through a warped broom handle. Even if clamped perfectly square in a lathe, after it's released you'll still have a bowed broom handle (or gun barrel). Straightening before machining is the only way to assure a truer barrel. (I can't imagine trying to to cut bollard rifling in an untrued barrel) We haven't even discussed cold hammer-forged barrels, (which are also great), & gotten way off original topic of barrel/chamber concentricity, which is what this was originally about. I am not here to attack a particular brand or to force my opinion. I just know that (good) barrel makers DO straighten barrels if needed. To do that for mass production is incredible. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Is it possible for the bore and the chamber to be non-concentric ?
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