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The Range
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<blockquote data-quote="EKing" data-source="post: 3302450" data-attributes="member: 43282"><p>Cartridges with a rim headspace and extract using different systems than cartridges without a rim. The 45 Automatic headspaces on the case mouth and extracts by being PULLED from the chamber. The 45 Auto Rim headspaces on the rim and extracts by being PUSHED out of the chamber by the rim. </p><p>The Maximum Case Length is the same for both cartridges so they could theoretically both headspace on the case mouth, but that would leave 0.041" difference between the forward portion of the 45 Auto Rim's rim and the 45 Automatic's rim, making extraction tricky for one or the other. Basically one of two options must be true:</p><p>1. It extracts the 45 Auto Rim reliably and leaves the 45 Automatic to be plucked out by hand, or</p><p>2. It extracts the 45 Auto Rim reliably and you made some custom "waxing crescent" moon clips that make each individual 45 Automatic cartridge effectively a single 45 Auto Rim, or</p><p>3. It extracts the 45 Automatic reliably (even more problems in a break-open action) and places great stress on the 45 Auto Rim case and the extractor.</p><p></p><p>These are the problems associated with a project such as this. I am not questioning you or your abilities. I am not trying to pick anything apart. I am curious and want to learn more about how you addressed these challenges. </p><p></p><p>My questions for you are:</p><p>1. Did you start with an H&R factory barrel?</p><p>2. Is your barrel chambered for the 45 Automatic in that it allows for headspacing on the case mouth?</p><p>3. Did you cut a recess in the barrel for the 45 Auto Rim to sit into? </p><p>4. Does your rifle reliably extract both cartridges or only the 45 Auto Rim?</p><p></p><p>Again, I am not questioning your work. I appreciate a good project and am just trying to learn more.</p></blockquote><p></p>
[QUOTE="EKing, post: 3302450, member: 43282"] Cartridges with a rim headspace and extract using different systems than cartridges without a rim. The 45 Automatic headspaces on the case mouth and extracts by being PULLED from the chamber. The 45 Auto Rim headspaces on the rim and extracts by being PUSHED out of the chamber by the rim. The Maximum Case Length is the same for both cartridges so they could theoretically both headspace on the case mouth, but that would leave 0.041" difference between the forward portion of the 45 Auto Rim's rim and the 45 Automatic's rim, making extraction tricky for one or the other. Basically one of two options must be true: 1. It extracts the 45 Auto Rim reliably and leaves the 45 Automatic to be plucked out by hand, or 2. It extracts the 45 Auto Rim reliably and you made some custom "waxing crescent" moon clips that make each individual 45 Automatic cartridge effectively a single 45 Auto Rim, or 3. It extracts the 45 Automatic reliably (even more problems in a break-open action) and places great stress on the 45 Auto Rim case and the extractor. These are the problems associated with a project such as this. I am not questioning you or your abilities. I am not trying to pick anything apart. I am curious and want to learn more about how you addressed these challenges. My questions for you are: 1. Did you start with an H&R factory barrel? 2. Is your barrel chambered for the 45 Automatic in that it allows for headspacing on the case mouth? 3. Did you cut a recess in the barrel for the 45 Auto Rim to sit into? 4. Does your rifle reliably extract both cartridges or only the 45 Auto Rim? Again, I am not questioning your work. I appreciate a good project and am just trying to learn more. [/QUOTE]
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