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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throating a rifle barrel
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<blockquote data-quote="Rustystud" data-source="post: 594886" data-attributes="member: 9964"><p>Some helpful hints:</p><p> </p><p>1. I buy all my reamers with only .020"-.040" freebore. Then I use a piloted throating reamer to cut my throats the desired depth. I suggest no flat based bullet be seated deeper than the necjk shoulder juncture of the case. I suggest no boattail bullet be seated deaper than the rear of the bearing surface at the neck shoulder juncture of the case. Seating bullets back beyond the neck shoulder juncture only ask for trouble with fliers.</p><p> </p><p>2. When using a piloted throating reamer use a mechanical stop that can be moved for ward incrementally. Throating is only removing the rifling and a sharp throating reamer can cut the rifling out like a knife in warm butter. Rewmember it is easy to remove metal but difficult to put it back.</p><p> </p><p>3. Remember a throating reamer is cutting a tapered hole and lenier measurment is not the same when cutting in two different planes.</p><p> </p><p>4. Aslo if you are using a dummy case with a bullet seated make sure the case is sized, trimmed, (measured to minimum spec. Be sure to chamfer and turn the necks a little. Also make sure the case is not contacting in the web area. You are want to measure off the bullet ogive.</p><p> </p><p>5. clean with a brush and clean patches and air before measuring.</p><p> </p><p> Nat Lambeth</p></blockquote><p></p>
[QUOTE="Rustystud, post: 594886, member: 9964"] Some helpful hints: 1. I buy all my reamers with only .020"-.040" freebore. Then I use a piloted throating reamer to cut my throats the desired depth. I suggest no flat based bullet be seated deeper than the necjk shoulder juncture of the case. I suggest no boattail bullet be seated deaper than the rear of the bearing surface at the neck shoulder juncture of the case. Seating bullets back beyond the neck shoulder juncture only ask for trouble with fliers. 2. When using a piloted throating reamer use a mechanical stop that can be moved for ward incrementally. Throating is only removing the rifling and a sharp throating reamer can cut the rifling out like a knife in warm butter. Rewmember it is easy to remove metal but difficult to put it back. 3. Remember a throating reamer is cutting a tapered hole and lenier measurment is not the same when cutting in two different planes. 4. Aslo if you are using a dummy case with a bullet seated make sure the case is sized, trimmed, (measured to minimum spec. Be sure to chamfer and turn the necks a little. Also make sure the case is not contacting in the web area. You are want to measure off the bullet ogive. 5. clean with a brush and clean patches and air before measuring. Nat Lambeth [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Throating a rifle barrel
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