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Rifles, Reloading, Optics, Equipment
Reloading
Hornady OAL Guage ?
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<blockquote data-quote="Moman" data-source="post: 369387" data-attributes="member: 10494"><p>Statjunk, a little hard to follow this post, but a couple of things I can think of that may help.</p><p> </p><p>1. Make sure your chamber area is completely clean. This includes the throat area. Any fouling or grime in these areas will give you erratic readings.</p><p> </p><p>2. The comparator is drilled and tapped on both sides. I always set mine up with the screw on the back side of the caliper blade. You can see there is a difference in the two sides, one is offset, the other is straight on. Set the comparator up so it is offset when measuring your dummy round off of your lands. Then rotate the tool 180 degrees, and thread the screw into the backside of comparator for taking measurements of loaded rounds. It will be dead on straight when in this position.</p><p> </p><p>3. Each time you move the comparator from side to side, re zero it on you calipers. </p><p> </p><p>Freebird, I wouldn't worry too much about your freebore situation at this time. I have a couple of factory Remingtons that have quite a bit of freebore and they are tack drivers. I think it's much more important that the action, chamber, barrel and ammo are concentric. My 308 jumps .135, my Sendero jumps .126, both are capable of quarter inch groups. </p><p> </p><p>As was mentioned, you will probably load to mag length, but it's still nice to know what the amount of jump is. When you get the hang of the Hornady tool, measure the freebore with one bullet and record the reading. Keep this bullet seperate with the notations. In the future, you can re measure with this bullet to keep an eye on throat erosion. Hope this helps.</p></blockquote><p></p>
[QUOTE="Moman, post: 369387, member: 10494"] Statjunk, a little hard to follow this post, but a couple of things I can think of that may help. 1. Make sure your chamber area is completely clean. This includes the throat area. Any fouling or grime in these areas will give you erratic readings. 2. The comparator is drilled and tapped on both sides. I always set mine up with the screw on the back side of the caliper blade. You can see there is a difference in the two sides, one is offset, the other is straight on. Set the comparator up so it is offset when measuring your dummy round off of your lands. Then rotate the tool 180 degrees, and thread the screw into the backside of comparator for taking measurements of loaded rounds. It will be dead on straight when in this position. 3. Each time you move the comparator from side to side, re zero it on you calipers. Freebird, I wouldn't worry too much about your freebore situation at this time. I have a couple of factory Remingtons that have quite a bit of freebore and they are tack drivers. I think it's much more important that the action, chamber, barrel and ammo are concentric. My 308 jumps .135, my Sendero jumps .126, both are capable of quarter inch groups. As was mentioned, you will probably load to mag length, but it's still nice to know what the amount of jump is. When you get the hang of the Hornady tool, measure the freebore with one bullet and record the reading. Keep this bullet seperate with the notations. In the future, you can re measure with this bullet to keep an eye on throat erosion. Hope this helps. [/QUOTE]
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Hornady OAL Guage ?
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