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Rifles, Reloading, Optics, Equipment
Gunsmithing
9mm luger chamber tolerances
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<blockquote data-quote="DUSTY NOGGIN" data-source="post: 2470404" data-attributes="member: 89550"><p>the reason for my question is I have a angstant ar9 upper lower.. bought separate .. I can not get it to feed well .. no reliability whatsoever</p><p></p><p>the barrel chamber opening really doesn't have any sort of feed ramp pretty sharp corner .. basically just a hope the the round comes out of the magazine and noses into the barrel .. about a 5/16" of a gap out of the magazine to the barrel opening ..</p><p> fmjs do ok but there is almost 90% failure to chamber with any HP or FN profiles projectiles</p><p></p><p>if a guy was to round off the corner of the barrel face to try and create a feed ramp how far up the side of the brass would you dare to go ?? imagine glock swell to give a little slack there</p><p></p><p>ill get a measurement of how far out my cases protrude and some pictures later ..</p><p></p><p>seems like the fix is chamber deeper to add in that angle . the shave that depth off the bolt</p><p></p><p>how far away do you think the barrel face should be away from the magazine ?? if the magazine angle looks in line ???</p><p></p><p>ill get pictures later today</p><p></p><p>is there a spec that an ar9 platforms upper need to be or should be so they can be compatible with other lowers ???</p></blockquote><p></p>
[QUOTE="DUSTY NOGGIN, post: 2470404, member: 89550"] the reason for my question is I have a angstant ar9 upper lower.. bought separate .. I can not get it to feed well .. no reliability whatsoever the barrel chamber opening really doesn't have any sort of feed ramp pretty sharp corner .. basically just a hope the the round comes out of the magazine and noses into the barrel .. about a 5/16" of a gap out of the magazine to the barrel opening .. fmjs do ok but there is almost 90% failure to chamber with any HP or FN profiles projectiles if a guy was to round off the corner of the barrel face to try and create a feed ramp how far up the side of the brass would you dare to go ?? imagine glock swell to give a little slack there ill get a measurement of how far out my cases protrude and some pictures later .. seems like the fix is chamber deeper to add in that angle . the shave that depth off the bolt how far away do you think the barrel face should be away from the magazine ?? if the magazine angle looks in line ??? ill get pictures later today is there a spec that an ar9 platforms upper need to be or should be so they can be compatible with other lowers ??? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
9mm luger chamber tolerances
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