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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7-375 ruger or 7 lrm ????
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<blockquote data-quote="elkaholic" data-source="post: 601052" data-attributes="member: 13833"><p>Gunwerks will only sell their brass to people who buy rifles from them. Once I get my rifle chambered I will get the sizing thing perfected but here is what I've done so far.</p><p>I cut .080" off of a full length 375 Ruger die and bumped the shoulder back. Next, I ran it thru a .338 RCM die set to neck size and make sure I only go back to the new shoulder, (same 30 degree angle). I then ran it thru a 300 SAUM die set to neck size and leave a little false shoulder on the .338 neck; just a few thou. This will be my headspacing angle. If I had my 30/375 S.I. dies, I might try skipping the 300 saum step and try to form the 40 degree shoulder at that time, but I really don't think that will be the best approach. My best guess is that the best approach will be to not use the S.I. die and simply fireform after using the SAUM. The case will need a little forming anyway to blow the taper out of the case body so I think this will work just fine. Basically, most of the forming will be just blowing .006" taper out and changing the 30 to a 40 degree shoulder at this point. It sounds a little tedious, but really wasn't bad at all when I tried it. With the throating in this chamber, the round should duplicate the Dakota at half the brass cost..........Rich</p></blockquote><p></p>
[QUOTE="elkaholic, post: 601052, member: 13833"] Gunwerks will only sell their brass to people who buy rifles from them. Once I get my rifle chambered I will get the sizing thing perfected but here is what I've done so far. I cut .080" off of a full length 375 Ruger die and bumped the shoulder back. Next, I ran it thru a .338 RCM die set to neck size and make sure I only go back to the new shoulder, (same 30 degree angle). I then ran it thru a 300 SAUM die set to neck size and leave a little false shoulder on the .338 neck; just a few thou. This will be my headspacing angle. If I had my 30/375 S.I. dies, I might try skipping the 300 saum step and try to form the 40 degree shoulder at that time, but I really don't think that will be the best approach. My best guess is that the best approach will be to not use the S.I. die and simply fireform after using the SAUM. The case will need a little forming anyway to blow the taper out of the case body so I think this will work just fine. Basically, most of the forming will be just blowing .006" taper out and changing the 30 to a 40 degree shoulder at this point. It sounds a little tedious, but really wasn't bad at all when I tried it. With the throating in this chamber, the round should duplicate the Dakota at half the brass cost..........Rich [/QUOTE]
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7-375 ruger or 7 lrm ????
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