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Hunting
The Basics, Starting Out
Savage 111 LRH 7mm Rem Mag - Not Holding Group
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<blockquote data-quote="Clark" data-source="post: 1105417" data-attributes="member: 6600"><p>I have dozens of beater rifles and take tools when I go to the range.</p><p>I help work on other people's guns while there.</p><p></p><p>If a rifle will not group, there are dozens of possible causes. But if there are some holes over there, and then over there.... the chances are better than 50% there is a screw loose.</p><p>Barrel lose? no</p><p>front action screw loose? no</p><p>Rear action screw loose? no</p><p>scope adjustment loose? no</p><p>Scope ring cap screw loose? no</p><p>Scope to base screw loose? no</p><p>Scope base to receiver screw loose? YES</p><p></p><p>>50% of the time in my guns or in other people's guns, it is the scope base screws.</p><p>This could happen because the screw has bottomed out. But I have not seen that.</p><p>This could happen with one piece bases, but I have not seen that.</p><p>This happens with those short little two piece bases with two screws each.</p><p></p><p>To prevent this from happening while hunting, I clean the male and female threads. I put epoxy between the base and the receiver with the base screws loose. I then put the scope and rings on and bore sight with the reticle in the center of the scope tube. When the epoxy is hard, I pull the base screws and put loctite on them and then screw them in hard. This also precludes the need for ring lapping.</p><p></p><p>Clamping force from a screw is proportional to the thread pitch and torque, minus the friction. That friction reduction with oil makes 25% more force or grease and 50% more with wax. That extra axial force can snap off small fasteners, but the barrel could take 2k foot pounds of torque. That may make wax tempting for barrel threads, but if any gets into the scope base thread holes, it can be hard to clean. One would have to clean the base threads with Ammonia with the rifle upside down. So if you must wax barrel threads, put so little on that it will not squeeze up into the scope base threads.</p></blockquote><p></p>
[QUOTE="Clark, post: 1105417, member: 6600"] I have dozens of beater rifles and take tools when I go to the range. I help work on other people's guns while there. If a rifle will not group, there are dozens of possible causes. But if there are some holes over there, and then over there.... the chances are better than 50% there is a screw loose. Barrel lose? no front action screw loose? no Rear action screw loose? no scope adjustment loose? no Scope ring cap screw loose? no Scope to base screw loose? no Scope base to receiver screw loose? YES >50% of the time in my guns or in other people's guns, it is the scope base screws. This could happen because the screw has bottomed out. But I have not seen that. This could happen with one piece bases, but I have not seen that. This happens with those short little two piece bases with two screws each. To prevent this from happening while hunting, I clean the male and female threads. I put epoxy between the base and the receiver with the base screws loose. I then put the scope and rings on and bore sight with the reticle in the center of the scope tube. When the epoxy is hard, I pull the base screws and put loctite on them and then screw them in hard. This also precludes the need for ring lapping. Clamping force from a screw is proportional to the thread pitch and torque, minus the friction. That friction reduction with oil makes 25% more force or grease and 50% more with wax. That extra axial force can snap off small fasteners, but the barrel could take 2k foot pounds of torque. That may make wax tempting for barrel threads, but if any gets into the scope base thread holes, it can be hard to clean. One would have to clean the base threads with Ammonia with the rifle upside down. So if you must wax barrel threads, put so little on that it will not squeeze up into the scope base threads. [/QUOTE]
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The Basics, Starting Out
Savage 111 LRH 7mm Rem Mag - Not Holding Group
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