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Rifles, Reloading, Optics, Equipment
Gunsmithing
When checking bolt-lug face surface % with a sharpie...
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<blockquote data-quote="Susquatch" data-source="post: 1643644" data-attributes="member: 31264"><p>First, I agree with your comments on this thread. In fact, I generally like and, agree with your posts even to the point of suggesting that others seek your opinion where I don't have one of my own.</p><p></p><p>However your comments above do raise some questions in some circles - especially the benchrest crowd who usually, but not always, prefer to avoid lapping and take the position that properly cut surfaces do not need lapping.</p><p></p><p>Central to their argument is their position that the trigger sear forces the bolt shaft to the top of the raceway prior to firing, and that the bolt will drop to its normal position after pulling the trigger. I have challenged this position in the past, but you never "bit" on my comments so I am now asking you directly.</p><p></p><p>Is this preloaded condition important?</p><p></p><p>Is there enough time between firing and bullet exit to make any falling of the bolt relevant?</p><p></p><p>Does the firing pin tension affect the bolt position during the interim between pin release and bullet exit?</p><p></p><p>I don't ask these questions because I have a strong position one way or the other. I ask because the answers dramatically affect the best approach to lapping the lugs. Frankly, I could save a lot of effort and cost buying custom bolts (to minimize the effect) if it doesn't really matter.</p><p></p><p>I also ask because the answer affects my thinking on trigger over travel.</p><p></p><p>I would love to understand these matters a bit better and would appreciate your views.</p><p></p><p>Maybe I should start a new thread.....</p></blockquote><p></p>
[QUOTE="Susquatch, post: 1643644, member: 31264"] First, I agree with your comments on this thread. In fact, I generally like and, agree with your posts even to the point of suggesting that others seek your opinion where I don't have one of my own. However your comments above do raise some questions in some circles - especially the benchrest crowd who usually, but not always, prefer to avoid lapping and take the position that properly cut surfaces do not need lapping. Central to their argument is their position that the trigger sear forces the bolt shaft to the top of the raceway prior to firing, and that the bolt will drop to its normal position after pulling the trigger. I have challenged this position in the past, but you never "bit" on my comments so I am now asking you directly. Is this preloaded condition important? Is there enough time between firing and bullet exit to make any falling of the bolt relevant? Does the firing pin tension affect the bolt position during the interim between pin release and bullet exit? I don't ask these questions because I have a strong position one way or the other. I ask because the answers dramatically affect the best approach to lapping the lugs. Frankly, I could save a lot of effort and cost buying custom bolts (to minimize the effect) if it doesn't really matter. I also ask because the answer affects my thinking on trigger over travel. I would love to understand these matters a bit better and would appreciate your views. Maybe I should start a new thread..... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
When checking bolt-lug face surface % with a sharpie...
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