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Rifles, Reloading, Optics, Equipment
Gunsmithing
Pedersoli Sharps chamber pressures?
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<blockquote data-quote="specweldtom" data-source="post: 429621" data-attributes="member: 2580"><p>Update: I found some good info that answers part of my question. </p><p></p><p>I don't know how to post links, but if you search for "Pedersoli proof test rules and allowable limits", it is very informative. </p><p></p><p>1st, Pedersoli cartridge rifles are NOT marked "for black powder only".</p><p></p><p>2nd, they allow up to 29,000 CUP's or PSI. Also, they proof test at 30% over that pressure. That comes out at 37,700 PSI. Since the rifle must survive this pressure without any damage in order to be sold, it seems that the 29,000 PSI limit is quite safe. I'm still surprised that it's not higher, but it does indicate that the materials used are probably low to medium carbon steels and not chrome-moly or chrome-nickel-moly high strength steel.</p><p></p><p>3rd, they allow the use of major brand commercial .45-70 factory loads. They do not endorse reloads. I did read on another search that .45-70 ammo loaded by Garrett is too hot for these old designs.</p><p></p><p>On the metallurgical part of the question, they only say that due to the use of modern steels and some redesign, their replicas are stronger than the originals. </p><p></p><p>If you're interested in this subject, it's worth finding and reading the whole article.</p><p></p><p>The question of using smokeless ammo has been answered, but I'd still like to know more about the metallurgy used. I'm pretty impressed by these rifles. </p><p></p><p>Good hunting, Tom</p></blockquote><p></p>
[QUOTE="specweldtom, post: 429621, member: 2580"] Update: I found some good info that answers part of my question. I don't know how to post links, but if you search for "Pedersoli proof test rules and allowable limits", it is very informative. 1st, Pedersoli cartridge rifles are NOT marked "for black powder only". 2nd, they allow up to 29,000 CUP's or PSI. Also, they proof test at 30% over that pressure. That comes out at 37,700 PSI. Since the rifle must survive this pressure without any damage in order to be sold, it seems that the 29,000 PSI limit is quite safe. I'm still surprised that it's not higher, but it does indicate that the materials used are probably low to medium carbon steels and not chrome-moly or chrome-nickel-moly high strength steel. 3rd, they allow the use of major brand commercial .45-70 factory loads. They do not endorse reloads. I did read on another search that .45-70 ammo loaded by Garrett is too hot for these old designs. On the metallurgical part of the question, they only say that due to the use of modern steels and some redesign, their replicas are stronger than the originals. If you're interested in this subject, it's worth finding and reading the whole article. The question of using smokeless ammo has been answered, but I'd still like to know more about the metallurgy used. I'm pretty impressed by these rifles. Good hunting, Tom [/QUOTE]
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Pedersoli Sharps chamber pressures?
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