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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Brass shot from factory remington 7RUM too tight in new Mc gowen barrel?
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<blockquote data-quote="MontanaRifleman" data-source="post: 921325" data-attributes="member: 11717"><p>Brandon, I agree that chasing a problem is not always the best way to solve it. So that's why I suggested to the OP to try turning the die down past bottoming out on the shell holder first. True, the brass not fired through the factory rifle will cycle just fine after sizing, as it sounds. But I have found, depending on a lot of variables, that different brass of the same cartridge do not always come out of the die the same. This is clearly the case with the OP. So he needs to take different steps to get the factory fired brass to fit the custom chamber. It sounds to me like the die needs to be screwed down until the brass fits the chamber. If it requires more than a quarter turn past bottoming out, I would recommend shaving either the die or the shell holder instead of running all 120 cases with the extra cam over and stress to the press - JMO. After getting this brass back to virgin or almost virgin dimensions, I highly recommend he anneal it because I'm guessing he will have worked the brass a good bit and though I'm not a metallurgist I'm guessing it will help to realign the molecules to the new shape.</p><p></p><p>As to your question regarding shaving down dies, The way I set up my dies is to adjust them, up OR down, until the brass barely chambers easily with no resistance to the bolt. This could mean that the die is screwed down at, or below, or above the top of the shell holder. Most of my dies are slightly above the top of the shell holder and a couple are slightly below, including one of the ones that was shaved. Shaving .010 - .020 off the die will have no bad effect so long as the web is not exposed. I have had no problems.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 921325, member: 11717"] Brandon, I agree that chasing a problem is not always the best way to solve it. So that's why I suggested to the OP to try turning the die down past bottoming out on the shell holder first. True, the brass not fired through the factory rifle will cycle just fine after sizing, as it sounds. But I have found, depending on a lot of variables, that different brass of the same cartridge do not always come out of the die the same. This is clearly the case with the OP. So he needs to take different steps to get the factory fired brass to fit the custom chamber. It sounds to me like the die needs to be screwed down until the brass fits the chamber. If it requires more than a quarter turn past bottoming out, I would recommend shaving either the die or the shell holder instead of running all 120 cases with the extra cam over and stress to the press - JMO. After getting this brass back to virgin or almost virgin dimensions, I highly recommend he anneal it because I'm guessing he will have worked the brass a good bit and though I'm not a metallurgist I'm guessing it will help to realign the molecules to the new shape. As to your question regarding shaving down dies, The way I set up my dies is to adjust them, up OR down, until the brass barely chambers easily with no resistance to the bolt. This could mean that the die is screwed down at, or below, or above the top of the shell holder. Most of my dies are slightly above the top of the shell holder and a couple are slightly below, including one of the ones that was shaved. Shaving .010 - .020 off the die will have no bad effect so long as the web is not exposed. I have had no problems. [/QUOTE]
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Brass shot from factory remington 7RUM too tight in new Mc gowen barrel?
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