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Rifles, Reloading, Optics, Equipment
Reloading
Modified cases for Hornady Lock-N-Load gauge
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<blockquote data-quote="AZShooter" data-source="post: 2476096" data-attributes="member: 5219"><p>Those lock and load cases use a non standard thread. The tap and tap drill can be purchased on line. I helped a friend figure out what the thread was but it has been years and I forgot. The case must be held in a lathe then drilled and the tap started square in the hole. Without the proper equipment it will be imprecise. </p><p></p><p>You really don't need to bother. Create a dummy round. Seat a bullet long in a case. Polish the jacket with fine steel wool. Try to close bolt. It may or may not close depending how much of the bullet is engaging the lands. If difficult then seat deeper and try again. At some point the bolt will close with mild resistance. The lands will engrave the jacket of the bullet. The equally spaced marks should be easy to see. Polish the jacket with each attempt. As you seat the bullet deeper the long rectangular marks will begin to get shorter, become square then the rectangle turns sideways. At this point you are getting close to where the bullet's ogive is just kissing the lands. Very faint marks will be seen. At this point the bullet is at zero. Keep that dummy round as a reference. At this point, you either need a calibrated seater die like a Redding competition seater or a comparator so you can measure the distance you moved the bullet deeper in the case. </p><p></p><p>If you don't have any of the things mentioned above and have a plain seater die the seater stem you can still get darn close to what you want with no measurement tools. A seater stem has a certain number of threads per inch. Some RCBS dies use 28 TPI. If you divide 1 by 28 you get .0357" per full rotation of stem. This can give you an approximate value. 1.4 turns would give you your .050 jump to lands. </p><p></p><p>I am willing to bet there are many handloaders here that did not have much in the way of measurement equipment when they started out. A hunting rifle doesn't need much to have it function. All that is required is to seat the bullet to fit and feed from the magazine, and make sure it doesn't touch the lands. Then the powder charges are worked up. All this without measuring anything! In fact, I still start the loading process that way. If I am not getting the accuracy I want then I will tweak the seating depth in .003" increments trying for a tighter group. Naturally this means seating the bullet deeper as it won't fit magazine going the other way. </p><p></p><p>Hope this helps.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 2476096, member: 5219"] Those lock and load cases use a non standard thread. The tap and tap drill can be purchased on line. I helped a friend figure out what the thread was but it has been years and I forgot. The case must be held in a lathe then drilled and the tap started square in the hole. Without the proper equipment it will be imprecise. You really don't need to bother. Create a dummy round. Seat a bullet long in a case. Polish the jacket with fine steel wool. Try to close bolt. It may or may not close depending how much of the bullet is engaging the lands. If difficult then seat deeper and try again. At some point the bolt will close with mild resistance. The lands will engrave the jacket of the bullet. The equally spaced marks should be easy to see. Polish the jacket with each attempt. As you seat the bullet deeper the long rectangular marks will begin to get shorter, become square then the rectangle turns sideways. At this point you are getting close to where the bullet's ogive is just kissing the lands. Very faint marks will be seen. At this point the bullet is at zero. Keep that dummy round as a reference. At this point, you either need a calibrated seater die like a Redding competition seater or a comparator so you can measure the distance you moved the bullet deeper in the case. If you don't have any of the things mentioned above and have a plain seater die the seater stem you can still get darn close to what you want with no measurement tools. A seater stem has a certain number of threads per inch. Some RCBS dies use 28 TPI. If you divide 1 by 28 you get .0357" per full rotation of stem. This can give you an approximate value. 1.4 turns would give you your .050 jump to lands. I am willing to bet there are many handloaders here that did not have much in the way of measurement equipment when they started out. A hunting rifle doesn't need much to have it function. All that is required is to seat the bullet to fit and feed from the magazine, and make sure it doesn't touch the lands. Then the powder charges are worked up. All this without measuring anything! In fact, I still start the loading process that way. If I am not getting the accuracy I want then I will tweak the seating depth in .003" increments trying for a tighter group. Naturally this means seating the bullet deeper as it won't fit magazine going the other way. Hope this helps. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Modified cases for Hornady Lock-N-Load gauge
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