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Rifles, Reloading, Optics, Equipment
Reloading
how do you find seating depth??
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<blockquote data-quote="LouBoyd" data-source="post: 582262" data-attributes="member: 9253"><p>Another method only requires a standard caliper (vernier, dial, or digital). It requires that the firearm has an action which has access from the rear and a place to measure from the barrel extension face on an AR or the rear end of the barrel on a Rem 700, some actions don't have a suitable place to measure from, or may require a caliper longer than 6" to make the rear of the action the reference. </p><p>1. Remove the bolt and make sure the chamber is clear.</p><p>2. make sure the action has a place where you set the end of the micrometer against the open end of the chamber so the depth gauge can reach into the chamber. Call this the action reference. In all cases the slide of the caliper should be parallel with the rifle bore. </p><p>3. Drop the bullet in question into the chamber gently so the bullet is sitting on the lands. Measure from the action reference to the base of the bullet. This is "base_depth"</p><p>4. remove the bullet and drop an empty case (preferably fired in that action) into the chamber. Measure from the same action reference to the case head (not into the primer hole). This is "head_depth".</p><p>5. Measure the bullet length from the base to the meplat (using the caliper jaws). This is "bullet_length"</p><p>6. calculate bullet_length+base_depth-head_depth = cartridge_overall_length</p><p>7. A cartridge loaded to with an overall length as calculated in step 5 will have the bullet touching the lands when chambered. </p><p></p><p>I'm not claiming this method is as precise as some of the specialized tools, but it is handy for determining if a particular bullet will work in with a firearm's magazine length and throat depth. It also gives a place to start for working up loads.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 582262, member: 9253"] Another method only requires a standard caliper (vernier, dial, or digital). It requires that the firearm has an action which has access from the rear and a place to measure from the barrel extension face on an AR or the rear end of the barrel on a Rem 700, some actions don't have a suitable place to measure from, or may require a caliper longer than 6" to make the rear of the action the reference. 1. Remove the bolt and make sure the chamber is clear. 2. make sure the action has a place where you set the end of the micrometer against the open end of the chamber so the depth gauge can reach into the chamber. Call this the action reference. In all cases the slide of the caliper should be parallel with the rifle bore. 3. Drop the bullet in question into the chamber gently so the bullet is sitting on the lands. Measure from the action reference to the base of the bullet. This is "base_depth" 4. remove the bullet and drop an empty case (preferably fired in that action) into the chamber. Measure from the same action reference to the case head (not into the primer hole). This is "head_depth". 5. Measure the bullet length from the base to the meplat (using the caliper jaws). This is "bullet_length" 6. calculate bullet_length+base_depth-head_depth = cartridge_overall_length 7. A cartridge loaded to with an overall length as calculated in step 5 will have the bullet touching the lands when chambered. I'm not claiming this method is as precise as some of the specialized tools, but it is handy for determining if a particular bullet will work in with a firearm's magazine length and throat depth. It also gives a place to start for working up loads. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
how do you find seating depth??
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