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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel Length 300 win Mag
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<blockquote data-quote="Trickymissfit" data-source="post: 656701" data-attributes="member: 25383"><p>Dan Lilja did a paper on the subject a few years back. His method of figuring the deflection was somewhat crude, but still reliable. Later I discussed this with Dan over several emails and he went further into his feelings. How much my groups did actually tighten I simply cannot confirm, but they did. I also did a complete rechamber at the sametime, and Dan felt that a good bit of the groups tightening up was from that alone. I'm certain Dan was spot on, but we're talking 4.25" groups down to .50". My guess is that I gained about .20" from barrel regidity alone. This would be an interesting test should somebody have a good and strait barrel that was 26" or more longer with no loose spots in the bore. (I don't think you can compair two different barrels in the same caliber). Later in I did my own test with a piece of 1" diameter 17PH-4 steel that I had the bore gun drilled to .250" for another project. I used a simple ten pound weight, and checked it every two inches. I saw similar results in that the closer I got to the anchoring point the stiffer the barrel was. The amount for the weight was just a guess, and something I happened to have laying around (a 10lb. piece of Mallory Metal)</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 656701, member: 25383"] Dan Lilja did a paper on the subject a few years back. His method of figuring the deflection was somewhat crude, but still reliable. Later I discussed this with Dan over several emails and he went further into his feelings. How much my groups did actually tighten I simply cannot confirm, but they did. I also did a complete rechamber at the sametime, and Dan felt that a good bit of the groups tightening up was from that alone. I'm certain Dan was spot on, but we're talking 4.25" groups down to .50". My guess is that I gained about .20" from barrel regidity alone. This would be an interesting test should somebody have a good and strait barrel that was 26" or more longer with no loose spots in the bore. (I don't think you can compair two different barrels in the same caliber). Later in I did my own test with a piece of 1" diameter 17PH-4 steel that I had the bore gun drilled to .250" for another project. I used a simple ten pound weight, and checked it every two inches. I saw similar results in that the closer I got to the anchoring point the stiffer the barrel was. The amount for the weight was just a guess, and something I happened to have laying around (a 10lb. piece of Mallory Metal) gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel Length 300 win Mag
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