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Effects Of Cartridge Over All Length (COAL) And Cartridge Base To Ogive (CBTO) – Part 2
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<blockquote data-quote="barefooter56" data-source="post: 1137645" data-attributes="member: 85389"><p>Mr Bamboo,</p><p> Paul,</p><p>This is why I always take the "dummy" round to the lands and check it by lightly polishing the tarnish off the bullet with 0000 steel wool and slowly re-chamber then extract it and check for lands marks on the bullet. If they are long I will seat the bullet a little deeper using very small adjustments on the seater stem , polish the marks off again and re-chamber and extract as before. I do this until I end up with 4 small "dots' or lines on the bullet. I am still slightly into the lands at this point but I still have a reference mark. Its at this point that I measure the CBTO with a bullet comparator and write that measurement along with the manufacturer , type and weight of bullet. I keep this round as a gauge to check throat erosion over the life of the barrel.</p><p>Hope this helps!</p></blockquote><p></p>
[QUOTE="barefooter56, post: 1137645, member: 85389"] Mr Bamboo, Paul, This is why I always take the "dummy" round to the lands and check it by lightly polishing the tarnish off the bullet with 0000 steel wool and slowly re-chamber then extract it and check for lands marks on the bullet. If they are long I will seat the bullet a little deeper using very small adjustments on the seater stem , polish the marks off again and re-chamber and extract as before. I do this until I end up with 4 small "dots' or lines on the bullet. I am still slightly into the lands at this point but I still have a reference mark. Its at this point that I measure the CBTO with a bullet comparator and write that measurement along with the manufacturer , type and weight of bullet. I keep this round as a gauge to check throat erosion over the life of the barrel. Hope this helps! [/QUOTE]
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Effects Of Cartridge Over All Length (COAL) And Cartridge Base To Ogive (CBTO) – Part 2
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