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Rifles, Reloading, Optics, Equipment
Reloading
How to measure chamber depth to seat bullets?
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<blockquote data-quote="MNbogboy" data-source="post: 684625" data-attributes="member: 18849"><p>What has worked for me is a variation of the "split necked case" method as Fire306 and Royinidaho use......I drill trough the primer pocket and tap the case head....I then machine two flat spots on the opposite sides of the case head (you can do this with a file if you have to)....Using a long eye bolt in the threaded end and a wrench across the two flat spots a person can easily "push" the bullet back out or remove after using....</p><p> </p><p>I do not split the necks but rather set the neck tension on the case to about .001 or so...this tension is enough to overcome the ejector plunger or even the extractor from prematurely pushing the bullet into the case before the bolt is fully closed....The modified neck tension will allow you to close the bolt with the bullet against the lands just as the split neck version.....</p><p> </p><p>"Magic marker" or similar coloring will allow you to re-check and verify your findings....This system has worked for me for over thirty years...I have a number of them hanging on the wall at my bench....I use 1/4-20 for .473 head calibers with 7/16 flats....and use 10-24 on my .222 & .221 with smaller flats (can't remember).....I have never tried this with a belted mag but see no reason why it would not work.....</p><p> </p><p>This system is fast and very functional....Again results will vary if you are not consistent with closing pressure & speeds...</p><p> </p><p>My .02,</p><p>Randy</p></blockquote><p></p>
[QUOTE="MNbogboy, post: 684625, member: 18849"] What has worked for me is a variation of the "split necked case" method as Fire306 and Royinidaho use......I drill trough the primer pocket and tap the case head....I then machine two flat spots on the opposite sides of the case head (you can do this with a file if you have to)....Using a long eye bolt in the threaded end and a wrench across the two flat spots a person can easily "push" the bullet back out or remove after using.... I do not split the necks but rather set the neck tension on the case to about .001 or so...this tension is enough to overcome the ejector plunger or even the extractor from prematurely pushing the bullet into the case before the bolt is fully closed....The modified neck tension will allow you to close the bolt with the bullet against the lands just as the split neck version..... "Magic marker" or similar coloring will allow you to re-check and verify your findings....This system has worked for me for over thirty years...I have a number of them hanging on the wall at my bench....I use 1/4-20 for .473 head calibers with 7/16 flats....and use 10-24 on my .222 & .221 with smaller flats (can't remember).....I have never tried this with a belted mag but see no reason why it would not work..... This system is fast and very functional....Again results will vary if you are not consistent with closing pressure & speeds... My .02, Randy [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How to measure chamber depth to seat bullets?
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