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Rifles, Reloading, Optics, Equipment
Gunsmithing
Out of round chamber question
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<blockquote data-quote="Coyboy" data-source="post: 362697" data-attributes="member: 3733"><p>We know most action are fail tested to pressures considerably higher than factory loadings. Knowing that the mauser was invented near the turn of the later century and used the very first smokless powders invented at the time, and understanding the original 8mm or 7mm for that matter, were a bit anemic in the loadings that were put thru the original Mausers. </p><p></p><p>I understand that plenty of mausers were chambered in the conventional magnums, and I have also seen some mausers with set-back lug abuments due to a lack of a proper heat treat, or pressures/ bolt thrust that created this over its usefull life. I have also seen some home shop specials that were welded after the front reciever ring apeared to have cracked after barrel removal. If your buying a Mauser look very carefully at them for any signs of tampering/rework. I dam near barreled that action before I noticed the faint seam inside the thread tennon, I give the welder credit he did a fine job with the polishing and cold blue. (this was one of the reasons I swore off working on mititary action)</p><p></p><p>The thread tennon on a mauser is 1" and with as coarse a thread that is cut on a mauser this does not leave a great abount of wall thickness between the thread root and chamber wall on a case that is .550 inches in dia. Add the fact that the UM class cartriges are run at higher pressures and I would advise against it in that action. I'm sure someone has done it but I wouldn't. </p><p></p><p>For liability reasons some of the smiths that specialize in rebuilding Military Mausers send them out for a proper heat treat before re barreling. Probably a good idea since some of them were built with prisoner labor. As far as I know this is not an issue with any of the comercial mauser clone actions.</p><p></p><p>a little long winded but might help some others who read this post as well.</p></blockquote><p></p>
[QUOTE="Coyboy, post: 362697, member: 3733"] We know most action are fail tested to pressures considerably higher than factory loadings. Knowing that the mauser was invented near the turn of the later century and used the very first smokless powders invented at the time, and understanding the original 8mm or 7mm for that matter, were a bit anemic in the loadings that were put thru the original Mausers. I understand that plenty of mausers were chambered in the conventional magnums, and I have also seen some mausers with set-back lug abuments due to a lack of a proper heat treat, or pressures/ bolt thrust that created this over its usefull life. I have also seen some home shop specials that were welded after the front reciever ring apeared to have cracked after barrel removal. If your buying a Mauser look very carefully at them for any signs of tampering/rework. I dam near barreled that action before I noticed the faint seam inside the thread tennon, I give the welder credit he did a fine job with the polishing and cold blue. (this was one of the reasons I swore off working on mititary action) The thread tennon on a mauser is 1" and with as coarse a thread that is cut on a mauser this does not leave a great abount of wall thickness between the thread root and chamber wall on a case that is .550 inches in dia. Add the fact that the UM class cartriges are run at higher pressures and I would advise against it in that action. I'm sure someone has done it but I wouldn't. For liability reasons some of the smiths that specialize in rebuilding Military Mausers send them out for a proper heat treat before re barreling. Probably a good idea since some of them were built with prisoner labor. As far as I know this is not an issue with any of the comercial mauser clone actions. a little long winded but might help some others who read this post as well. [/QUOTE]
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Out of round chamber question
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