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Rifles, Reloading, Optics, Equipment
Reloading
Bumping Shoulders Issue
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<blockquote data-quote="Buffalobob" data-source="post: 372432" data-attributes="member: 8"><p>You only bump the shoulder when you need to bump the shoulder or you do it based upon a knowledge of your chamber. </p><p></p><p>Here is what to do (and there are probably easier methods but this is mine)</p><p></p><p>Take your fired brass and start running it through your rifle until you find one that makes the bolt hard to close. Perhaps find a couple more just to double check things being as this is your first time.</p><p></p><p>Go to your press and screw in the sizing die but leave it about a quarter inch or so high.</p><p>Lube the brass inside and out</p><p>Run the brass through the die and then try it in the chamber. It will probably still be stiff</p><p></p><p>Go back to the die and screw it down some more being as you didn't bump the shoulder. Run the piece of brass through and check it in the rifle again.</p><p></p><p>Keep doing this until you finally get the die screwed in to just barely size the case enough that the bolt closes easily.</p><p></p><p>At this point you need to do two things.</p><p></p><p>Get your runout gauge out and check the neck for straightness. If it is straight then lock the ring on the die so that it will never ever move again. If the neck is not straight then you have to fiddle with the lock ring and try to get the die lined up to where it is straight and then lock down the ring tight so it never ever move again.</p><p></p><p>To sum it up, I do not use a measuring tool. I use the feel of the bolt closing to determine when the die is set properly to "bump the shoulder"</p></blockquote><p></p>
[QUOTE="Buffalobob, post: 372432, member: 8"] You only bump the shoulder when you need to bump the shoulder or you do it based upon a knowledge of your chamber. Here is what to do (and there are probably easier methods but this is mine) Take your fired brass and start running it through your rifle until you find one that makes the bolt hard to close. Perhaps find a couple more just to double check things being as this is your first time. Go to your press and screw in the sizing die but leave it about a quarter inch or so high. Lube the brass inside and out Run the brass through the die and then try it in the chamber. It will probably still be stiff Go back to the die and screw it down some more being as you didn't bump the shoulder. Run the piece of brass through and check it in the rifle again. Keep doing this until you finally get the die screwed in to just barely size the case enough that the bolt closes easily. At this point you need to do two things. Get your runout gauge out and check the neck for straightness. If it is straight then lock the ring on the die so that it will never ever move again. If the neck is not straight then you have to fiddle with the lock ring and try to get the die lined up to where it is straight and then lock down the ring tight so it never ever move again. To sum it up, I do not use a measuring tool. I use the feel of the bolt closing to determine when the die is set properly to "bump the shoulder" [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Bumping Shoulders Issue
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