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Truing or squaring an action
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<blockquote data-quote="Bart B" data-source="post: 101840" data-attributes="member: 5302"><p>50driver, I expected you to post something saying my 'smith's method isn't really correct for blueprinting an action. I agree with you that the method you explained will sure make one trued up very well indeed. My 'smith has told me many times over the years that he gets told that at least once a month. But nobody's built a rifle on any box magazine action reworked any way that's shot any more accurate. So, he says, why go to all that extra work at his time and the customer's expense when it isn't gonna help.</p><p></p><p>It is important that the receiver's barrel thread section be fairly well in line with the bolt axis. There was a pre '64 Model 70 action floating around the highpower match rifle 'smiths in the early '70s that nobody could get to shoot with any barrel. My 'smith finally was sent it from its most recent owner to fit a barrel to and its serial number rang a bell. He called another 'smith and asked him about receiver number xxxxxx and the other 'smith said he'd tried two barrels in it and it wouldn't shoot. So my smith put it on his facing mandrel, chucked it in a lathe and spun it at low speed. The back end had near a quarter inch of runout. He didn't barrel it but instead returned it to its owner explaining it was a bad receiver for a competition rifle but fine for hunting.</p></blockquote><p></p>
[QUOTE="Bart B, post: 101840, member: 5302"] 50driver, I expected you to post something saying my 'smith's method isn't really correct for blueprinting an action. I agree with you that the method you explained will sure make one trued up very well indeed. My 'smith has told me many times over the years that he gets told that at least once a month. But nobody's built a rifle on any box magazine action reworked any way that's shot any more accurate. So, he says, why go to all that extra work at his time and the customer's expense when it isn't gonna help. It is important that the receiver's barrel thread section be fairly well in line with the bolt axis. There was a pre '64 Model 70 action floating around the highpower match rifle 'smiths in the early '70s that nobody could get to shoot with any barrel. My 'smith finally was sent it from its most recent owner to fit a barrel to and its serial number rang a bell. He called another 'smith and asked him about receiver number xxxxxx and the other 'smith said he'd tried two barrels in it and it wouldn't shoot. So my smith put it on his facing mandrel, chucked it in a lathe and spun it at low speed. The back end had near a quarter inch of runout. He didn't barrel it but instead returned it to its owner explaining it was a bad receiver for a competition rifle but fine for hunting. [/QUOTE]
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