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Rifles, Reloading, Optics, Equipment
Reloading
First time reloader- using OAL gauge help
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<blockquote data-quote="AZShooter" data-source="post: 985671" data-attributes="member: 5219"><p>You don't need your comparator or even a caliper to figure out where to seat a bullet. As you will find out many rifles have magazines that are too short to allow a bullet to engage the rifling. </p><p></p><p>My approach is to seat a bullet out as far as possible to fit and feed from magazine. I then will polish the jacket material with fine steel wool and chamber the dummy round. After removal the jacket is carefully inspected for any marks made by the lands. It is a rare package that has the bullet into the rifling.</p><p></p><p> If you want to know how far the bullet is from the rifling then you can use your caliper with the comparator. Seat a bullet so it is extending out of the case quite a bit. Polish the jacket and close the bolt on it. It may require some camming action to get the bolt shut or it may even be too long. Adjust so you can get the bolt shut. Remove dummy round and inspect the jacket for marks. There will most likely be some large engraved marks from the lands. (Don't expect this with all chamberings as some have huge freebores, the bullet will fall out of the case before it could engage the rifling.) Once you have a seating depth that engraves the bullet gradually seat deeper checking the polished jacket till the marks are very small. At some point you can call that kissing the rifling. </p><p></p><p>Take the comparator and measure your two dummy rounds. The difference is the jump to the rifling. </p><p></p><p>Conversely if you ever want to seat a bullet so it is heavily engraved into the rifling as some BR guys do, just compare the kiss measurement vs the heavily engraved find the amount of engagement. My friend Bruce and I both experimented with VLDs .035" into the rifling with a couple of BR rifles. </p><p></p><p>Last week I helped a friend make a load for his 257 Roberts that is built on an old mauser. This rifle is a long action so it had enough room for the VLD to engage the rifling and feed from the magazine! In this situation I seated a bullet so it engaged the rifling and still fed. I kept polishing the jacket and seated a bit deeper till I had an engagement mark from the rifling that was perfectly square. I called it good and worked my way up in powder weights. </p><p></p><p>Hope this makes sense.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 985671, member: 5219"] You don't need your comparator or even a caliper to figure out where to seat a bullet. As you will find out many rifles have magazines that are too short to allow a bullet to engage the rifling. My approach is to seat a bullet out as far as possible to fit and feed from magazine. I then will polish the jacket material with fine steel wool and chamber the dummy round. After removal the jacket is carefully inspected for any marks made by the lands. It is a rare package that has the bullet into the rifling. If you want to know how far the bullet is from the rifling then you can use your caliper with the comparator. Seat a bullet so it is extending out of the case quite a bit. Polish the jacket and close the bolt on it. It may require some camming action to get the bolt shut or it may even be too long. Adjust so you can get the bolt shut. Remove dummy round and inspect the jacket for marks. There will most likely be some large engraved marks from the lands. (Don't expect this with all chamberings as some have huge freebores, the bullet will fall out of the case before it could engage the rifling.) Once you have a seating depth that engraves the bullet gradually seat deeper checking the polished jacket till the marks are very small. At some point you can call that kissing the rifling. Take the comparator and measure your two dummy rounds. The difference is the jump to the rifling. Conversely if you ever want to seat a bullet so it is heavily engraved into the rifling as some BR guys do, just compare the kiss measurement vs the heavily engraved find the amount of engagement. My friend Bruce and I both experimented with VLDs .035" into the rifling with a couple of BR rifles. Last week I helped a friend make a load for his 257 Roberts that is built on an old mauser. This rifle is a long action so it had enough room for the VLD to engage the rifling and feed from the magazine! In this situation I seated a bullet so it engaged the rifling and still fed. I kept polishing the jacket and seated a bit deeper till I had an engagement mark from the rifling that was perfectly square. I called it good and worked my way up in powder weights. Hope this makes sense. [/QUOTE]
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First time reloader- using OAL gauge help
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