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Rifles, Reloading, Optics, Equipment
Reloading
Help determining actual incipient head case seperation signs
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<blockquote data-quote="bigedp51" data-source="post: 1467369" data-attributes="member: 28965"><p>I collected old milsurp rifles and used the $100.00 bent paper clip below to measure case stretching and thinning. (RCBS case mastering gauge)</p><p></p><p><img src="https://i.imgur.com/CCntXIg.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below a factory loaded Winchester .303 British case that stretched and thinned .009 on the first firing. And with a bent paper clip I was not sure if I felt the thinning or not and why I bought the RCBS gauge. Old milsurp rifles can have long fat chambers and be hard on brass.</p><p></p><p><img src="https://i.imgur.com/B1hY7TM.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below on the far right is a .303 case that was full length resized and fired twice. This case did not split and leak but you can see is ready to totally split.</p><p></p><p><img src="https://i.imgur.com/NHlR9jO.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below a .303 case that split but did not have a total case head separation.</p><p></p><p><img src="https://i.imgur.com/DVy4C4T.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below a Hornady cartridge case headspace gauge and a very good tool for measuring new, fired and resized cases.</p><p></p><p><img src="https://i.imgur.com/OJqNmQH.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Bottom line, if you know the headspace of your chamber and size your cases with minimum shoulder bump your cases should not stretch and thin.</p><p></p><p>Below it is your head clearance with new cases and resized cases that determines if your cases stretch beyound their elastic limits.</p><p></p><p><img src="https://i.imgur.com/HK76WCp.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://i.imgur.com/sHgqVJR.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1467369, member: 28965"] I collected old milsurp rifles and used the $100.00 bent paper clip below to measure case stretching and thinning. (RCBS case mastering gauge) [IMG]https://i.imgur.com/CCntXIg.jpg[/IMG] Below a factory loaded Winchester .303 British case that stretched and thinned .009 on the first firing. And with a bent paper clip I was not sure if I felt the thinning or not and why I bought the RCBS gauge. Old milsurp rifles can have long fat chambers and be hard on brass. [IMG]https://i.imgur.com/B1hY7TM.jpg[/IMG] Below on the far right is a .303 case that was full length resized and fired twice. This case did not split and leak but you can see is ready to totally split. [IMG]https://i.imgur.com/NHlR9jO.jpg[/IMG] Below a .303 case that split but did not have a total case head separation. [IMG]https://i.imgur.com/DVy4C4T.jpg[/IMG] Below a Hornady cartridge case headspace gauge and a very good tool for measuring new, fired and resized cases. [img]https://i.imgur.com/OJqNmQH.jpg[/img] Bottom line, if you know the headspace of your chamber and size your cases with minimum shoulder bump your cases should not stretch and thin. Below it is your head clearance with new cases and resized cases that determines if your cases stretch beyound their elastic limits. [img]https://i.imgur.com/HK76WCp.jpg[/img] [img]https://i.imgur.com/sHgqVJR.gif[/img] [/QUOTE]
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Reloading
Help determining actual incipient head case seperation signs
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