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Rifles, Reloading, Optics, Equipment
Reloading
seating depth by oal guage or chamber method?
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<blockquote data-quote="Centre Punch" data-source="post: 77454" data-attributes="member: 3048"><p>Hi nelsonic,</p><p>I use the "Ranging Rod" method i read about in a handloaders digest many years ago. This consists of a 30" length of 5mm brass rod ( for 22c/f and 243, 6mm, etc,7mm for 308) too which i have attached a locking collar approx 1" diameter and 1/2" thick.</p><p></p><p>Firstly i lift the bolt to cock the firing pin, i then slide the brass rod down the muzzel until it stops against the bolt face. i hold it in place and move the collar to contact the muzzel and look it in place.</p><p>With my Vernier i measure the protrusion of the rod from the face of the collar 3 times and record the mean reading.</p><p></p><p>The same process is then repeated but this time with the bolt removed and i have an assistant wedge my chosen bullet into the lands and hold it there with a suitable piece of dowel. The rod is then slid down the muzzel untill it touches the tip of the bullet, the collar locked and a reading of the protrusion taken and recorded as before.</p><p></p><p>Subtract the smaller dimension from the larger dimension and this will give you the exact C.O.A.L. for that bullet.</p><p>I then make up a dummy round to this exact C.O.A.L., take a bullet comparator reading and use this dummy round to set up my dies.</p><p></p><p>In my opinion this the most accurate way of finding your C.O.A.L and it may be a bit of a chore to do this with every different bullet you use, but in the quest for accuracy i think it is well worth it.</p><p></p><p>Ian.</p><p></p><p>"I mean't to shoot the pike but the duck got in the way"</p></blockquote><p></p>
[QUOTE="Centre Punch, post: 77454, member: 3048"] Hi nelsonic, I use the "Ranging Rod" method i read about in a handloaders digest many years ago. This consists of a 30" length of 5mm brass rod ( for 22c/f and 243, 6mm, etc,7mm for 308) too which i have attached a locking collar approx 1" diameter and 1/2" thick. Firstly i lift the bolt to cock the firing pin, i then slide the brass rod down the muzzel until it stops against the bolt face. i hold it in place and move the collar to contact the muzzel and look it in place. With my Vernier i measure the protrusion of the rod from the face of the collar 3 times and record the mean reading. The same process is then repeated but this time with the bolt removed and i have an assistant wedge my chosen bullet into the lands and hold it there with a suitable piece of dowel. The rod is then slid down the muzzel untill it touches the tip of the bullet, the collar locked and a reading of the protrusion taken and recorded as before. Subtract the smaller dimension from the larger dimension and this will give you the exact C.O.A.L. for that bullet. I then make up a dummy round to this exact C.O.A.L., take a bullet comparator reading and use this dummy round to set up my dies. In my opinion this the most accurate way of finding your C.O.A.L and it may be a bit of a chore to do this with every different bullet you use, but in the quest for accuracy i think it is well worth it. Ian. "I mean't to shoot the pike but the duck got in the way" [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
seating depth by oal guage or chamber method?
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