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Rifles, Reloading, Optics, Equipment
Reloading
F C Brass question, some tight in the chamber some not.
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<blockquote data-quote="AZShooter" data-source="post: 1227112" data-attributes="member: 5219"><p>I first encountered the tight fitting brass with a 338 RCM. It began to have bolt closure/extraction issues after two firings. </p><p></p><p>I used a sharpie to determine the base was not sized enough with RCBS, Hornady or Redding FL dies. I later encountered this with the 300 RUM after a few firings as well. </p><p></p><p>IMO the issue is thicker case walls which results in less springback after several firings. I don't think the manufacturers are considering this in determining the size of their FL sizer dimensions. If the die was changed for more base sizing the issue would be eliminated. Unfortunately the standard die dimensions are not small enough. </p><p></p><p>RCBS offers a small base die for the 270 WSM which I think you could try first.</p><p></p><p> <a href="http://www.midwayusa.com/product/234278/rcbs-small-base-2-die-set-270-winchester-short-magnum-wsm" target="_blank">RCBS Small Base 2-Die Set 270 Winchester Short Mag (WSM)</a></p><p></p><p>If that doesn't do it you could send a few fired cases to Whidden and have them make a FL die for your needs. </p><p></p><p>I own a lathe and decided to make my own small base die. I took the RCBS FL 338 RCM die and shortened it at both ends by using a carbide tool bit. It worked so well I made one for my 300 RUM as well. </p><p></p><p>Now you know what is causing it. See if you can get it solved.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 1227112, member: 5219"] I first encountered the tight fitting brass with a 338 RCM. It began to have bolt closure/extraction issues after two firings. I used a sharpie to determine the base was not sized enough with RCBS, Hornady or Redding FL dies. I later encountered this with the 300 RUM after a few firings as well. IMO the issue is thicker case walls which results in less springback after several firings. I don't think the manufacturers are considering this in determining the size of their FL sizer dimensions. If the die was changed for more base sizing the issue would be eliminated. Unfortunately the standard die dimensions are not small enough. RCBS offers a small base die for the 270 WSM which I think you could try first. [url=http://www.midwayusa.com/product/234278/rcbs-small-base-2-die-set-270-winchester-short-magnum-wsm]RCBS Small Base 2-Die Set 270 Winchester Short Mag (WSM)[/url] If that doesn't do it you could send a few fired cases to Whidden and have them make a FL die for your needs. I own a lathe and decided to make my own small base die. I took the RCBS FL 338 RCM die and shortened it at both ends by using a carbide tool bit. It worked so well I made one for my 300 RUM as well. Now you know what is causing it. See if you can get it solved. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
F C Brass question, some tight in the chamber some not.
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