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Rifles, Reloading, Optics, Equipment
Reloading
I seriously doubt this is case head separation but what do you guys think?
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<blockquote data-quote="bigedp51" data-source="post: 1410176" data-attributes="member: 28965"><p>J E CUSTOM</p><p></p><p>You don't know what you think you know.</p><p></p><p>Not only did I collect the Enfield rifle I also collected all the military manuals and books on the Enfield rifle. And at one time had the largest Enfield manual sticky in two Enfield forums anywhere on the Internet.</p><p></p><p>Below are the British headspace gauges and limits directly from the British manual dated 1957.</p><p></p><p><img src="https://i.imgur.com/99ilLmw.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><span style="color: #ff0000">SM 139- Gauge, Armourer's, headspace, chamber accept, 0.064 inch No1</span></p><p><span style="color: #ff0000">SM 140- Gauge, Armourer's, headspace, chamber reject, 0.074 inch Royal If bolt closes on SM140--Shant fire!</span></p><p><span style="color: #5900b3"></span></p><p><span style="color: #5900b3">Below from the British 1931 Instruction for Armourers</span></p><p><span style="color: #5900b3">4. Action:—Bolt and bolt-head.</span></p><p><span style="color: #5900b3">(i) Test the distance of the bolt from the end of the chamber with gauges .064-inch No. 1 and .074-inch No. 1; the bolt should close over the .064, but not over the .074; when using the latter gauge, light thumb-pressure only should be applied to the knob. Also test to see that the wing of the bolt-head does not lift off the rib of the body.</span></p><p></p><p>Firing pin protrusion .040 to .050</p><p></p><p>A Enfield rifle at the maximum headspace of .074 and a case with a rim thickness of .058 will have .016 head clearance.</p><p></p><p>Meaning even at the minimum firing pin protrusion of .040 and maximum headspace of .074 the cartridge will fire.</p><p></p><p>Also I can not believe you do not know how the primer moves to the rear before the case stretches to meet the bolt face.</p><p></p><p><img src="https://i.imgur.com/sHgqVJR.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>And the .074 headspace gauge pictured below is very real.</p><p></p><p><img src="https://i.imgur.com/Ihc1Ywv.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below are images from a Australian book on accurizing the Enfield rifle.</p><p></p><p><img src="https://i.imgur.com/o9BFx3l.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>The images below are in the book above but are from a book published in 1947. The .070 gauge is used in Canada and Australia as commercial NO-GO gauge. "BUT" the .074 gauge is still max military headspace.</p><p></p><p><img src="https://i.imgur.com/Z1vo7BI.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p><img src="https://i.imgur.com/FiWkaiY.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>And my No.4 Enfield below has two bolt heads fitted.</p><p></p><p><img src="https://i.imgur.com/v1GFvaK.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>And I have military Enfield manuals dating to 1929 and pamphlets (pams) back to WWI.</p><p></p><p><img src="https://i.imgur.com/nWygpwa.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1410176, member: 28965"] J E CUSTOM You don't know what you think you know. Not only did I collect the Enfield rifle I also collected all the military manuals and books on the Enfield rifle. And at one time had the largest Enfield manual sticky in two Enfield forums anywhere on the Internet. Below are the British headspace gauges and limits directly from the British manual dated 1957. [IMG]https://i.imgur.com/99ilLmw.jpg[/IMG] [COLOR=#ff0000]SM 139- Gauge, Armourer's, headspace, chamber accept, 0.064 inch No1 SM 140- Gauge, Armourer's, headspace, chamber reject, 0.074 inch Royal If bolt closes on SM140--Shant fire![/COLOR] [COLOR=#5900b3] Below from the British 1931 Instruction for Armourers 4. Action:—Bolt and bolt-head. (i) Test the distance of the bolt from the end of the chamber with gauges .064-inch No. 1 and .074-inch No. 1; the bolt should close over the .064, but not over the .074; when using the latter gauge, light thumb-pressure only should be applied to the knob. Also test to see that the wing of the bolt-head does not lift off the rib of the body.[/COLOR] Firing pin protrusion .040 to .050 A Enfield rifle at the maximum headspace of .074 and a case with a rim thickness of .058 will have .016 head clearance. Meaning even at the minimum firing pin protrusion of .040 and maximum headspace of .074 the cartridge will fire. Also I can not believe you do not know how the primer moves to the rear before the case stretches to meet the bolt face. [IMG]https://i.imgur.com/sHgqVJR.gif[/IMG] And the .074 headspace gauge pictured below is very real. [IMG]https://i.imgur.com/Ihc1Ywv.jpg[/IMG] Below are images from a Australian book on accurizing the Enfield rifle. [IMG]https://i.imgur.com/o9BFx3l.jpg[/IMG] The images below are in the book above but are from a book published in 1947. The .070 gauge is used in Canada and Australia as commercial NO-GO gauge. "BUT" the .074 gauge is still max military headspace. [IMG]https://i.imgur.com/Z1vo7BI.jpg[/IMG] [IMG]https://i.imgur.com/FiWkaiY.jpg[/IMG] And my No.4 Enfield below has two bolt heads fitted. [IMG]https://i.imgur.com/v1GFvaK.jpg[/IMG] And I have military Enfield manuals dating to 1929 and pamphlets (pams) back to WWI. [IMG]https://i.imgur.com/nWygpwa.jpg[/IMG] [/QUOTE]
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I seriously doubt this is case head separation but what do you guys think?
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