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Rifles, Reloading, Optics, Equipment
Reloading
Let talk about brass trimming???
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<blockquote data-quote="AZShooter" data-source="post: 1052021" data-attributes="member: 5219"><p>I hate trimming. Once the brass is determined to be the same length I won't trim depending on the length of the chamber. I determine exactly where the end of the chamber is by using one of these:</p><p></p><p><a href="http://www.sinclairintl.com/reloading-equipment/measuring-tools/case-gauges-headspace-tools/sinclair-chamber-length-gage-prod32925.aspx" target="_blank">http://www.sinclairintl.com/reloading-equipment/measuring-tools/case-gauges-headspace-tools/sinclair-chamber-length-gage-prod32925.aspx</a></p><p></p><p>I discovered years ago that many chambers won't require you to trim the brass for many firings/ sizings. Some factory chambers are as much as .070" longer than the recommended trim length listed in the loading books. Why trim if you don't have to? </p><p></p><p>You will have to remove much of the neck of a case for use with the gauge. Seat the gauge long in the case then close bolt on it. The plug will slide rearwards. Carefully remove and measure the OAL to determine end of chamber dimension. I like to repeat this several times to be certain. </p><p></p><p>If you have access to a lathe you can get specs on the gauge on Varmint Al's site so you can make your own. I use aluminum or brass:</p><p></p><p>Varmint Al's Mini Lathe Page:</p><p></p><p> <a href="http://www.varmintal.com/alath.htm" target="_blank">http://www.varmintal.com/alath.htm</a></p><p></p><p>Al also explains how to use: </p><p></p><p><a href="http://www.varmintal.com/arelo.htm" target="_blank">http://www.varmintal.com/arelo.htm</a></p><p></p><p>The only brass I ever crimped was some 375 H and H ammo that was going to go to Africa to hunt dangerous game. It was requested by the owner. Don't blame him as he was looking for every safety precaution. I only crimp for handguns don't ever intend to do so for my rifles.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 1052021, member: 5219"] I hate trimming. Once the brass is determined to be the same length I won't trim depending on the length of the chamber. I determine exactly where the end of the chamber is by using one of these: [url]http://www.sinclairintl.com/reloading-equipment/measuring-tools/case-gauges-headspace-tools/sinclair-chamber-length-gage-prod32925.aspx[/url] I discovered years ago that many chambers won't require you to trim the brass for many firings/ sizings. Some factory chambers are as much as .070" longer than the recommended trim length listed in the loading books. Why trim if you don't have to? You will have to remove much of the neck of a case for use with the gauge. Seat the gauge long in the case then close bolt on it. The plug will slide rearwards. Carefully remove and measure the OAL to determine end of chamber dimension. I like to repeat this several times to be certain. If you have access to a lathe you can get specs on the gauge on Varmint Al's site so you can make your own. I use aluminum or brass: Varmint Al's Mini Lathe Page: [url]http://www.varmintal.com/alath.htm[/url] Al also explains how to use: [url]http://www.varmintal.com/arelo.htm[/url] The only brass I ever crimped was some 375 H and H ammo that was going to go to Africa to hunt dangerous game. It was requested by the owner. Don't blame him as he was looking for every safety precaution. I only crimp for handguns don't ever intend to do so for my rifles. [/QUOTE]
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Let talk about brass trimming???
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