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Rifles, Reloading, Optics, Equipment
Reloading
Powder Pressure differences between Nickel Plated Brass vs Normal Brass
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<blockquote data-quote="crkckr" data-source="post: 1702950" data-attributes="member: 78056"><p>The most likely problem to come up from excessive bolt thrust is damage to the bolt and/or locking lugs. Again, this is something that *might* occur if a lot of rounds were fired at max pressures.</p><p></p><p>That said, if the bolt lugs had good, even contact in the first place, it's probable that there would be nothing to see. I don't believe it's a dangerous situation unless there was some serious mismatch in how the lugs locked up.</p><p></p><p>I've looked around trying to find the article regarding bolt thrust with nickle brass in high pressure rifle rounds but found nothing. I read about this many years ago, long before the internet was around.</p><p></p><p>As to trimming nickle cases, a sharp carbide cutting tool is required and then in and outside deburring, again with a sharp tool, is necessary. I've got nickle cases that have been fired and trimmed many times, although they do tend to crack in the neck area easier than brass. A perfect trim job might require a bit of 0000 steel wool as well.</p><p></p><p>I used to own an HK91 that not only made it difficult to even find the brass after it was fired but the fluted chamber marks on the necks lead to cracking on the second or third reload! I don't really miss that rifle too much but never did replace it with anything similar, such as an M14 or FAL. Oh well, such is life.</p><p>Cheers, </p><p>crkckr</p></blockquote><p></p>
[QUOTE="crkckr, post: 1702950, member: 78056"] The most likely problem to come up from excessive bolt thrust is damage to the bolt and/or locking lugs. Again, this is something that *might* occur if a lot of rounds were fired at max pressures. That said, if the bolt lugs had good, even contact in the first place, it's probable that there would be nothing to see. I don't believe it's a dangerous situation unless there was some serious mismatch in how the lugs locked up. I've looked around trying to find the article regarding bolt thrust with nickle brass in high pressure rifle rounds but found nothing. I read about this many years ago, long before the internet was around. As to trimming nickle cases, a sharp carbide cutting tool is required and then in and outside deburring, again with a sharp tool, is necessary. I've got nickle cases that have been fired and trimmed many times, although they do tend to crack in the neck area easier than brass. A perfect trim job might require a bit of 0000 steel wool as well. I used to own an HK91 that not only made it difficult to even find the brass after it was fired but the fluted chamber marks on the necks lead to cracking on the second or third reload! I don't really miss that rifle too much but never did replace it with anything similar, such as an M14 or FAL. Oh well, such is life. Cheers, crkckr [/QUOTE]
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Powder Pressure differences between Nickel Plated Brass vs Normal Brass
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