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Rifles, Reloading, Optics, Equipment
Reloading
Bullet Jump/Jammed - Is it the Bullet design or the rifle
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<blockquote data-quote="Mikecr" data-source="post: 1983821" data-attributes="member: 1521"><p>Bullet seating is no more tuning than primer swapping is.</p><p>Both are prerequisite to best tune,, they can both take you out of tune, but you cannot actually tune with either.</p><p>You tune with powder(right to the kernel) and neck tension.</p><p></p><p>Full seating testing, as Berger recommends, is a coarse process to find the land relationship that a bullet likes in YOUR barrel. This cannot be predicted but has to be tested for. JUST LIKE PRIMER SWAPPING.</p><p>Both cause huge dispersion changes, way beyond that of actual tuning with powder.</p><p>With full seating testing, you can make a 1/4moa gun open to 3/4moa & back. No amount of powder change(type or amount) can do that, and you will not recover from worst seating or worst primers -with tuning.</p><p>That's why it's vital, right up front, to determine best bullet seating, and best primer, as prerequisites to tuning.</p><p>Also, once you have determined best seating with a bullet/barrel, and best primer for powder/cartridge, this does not change. Even if you start load development over with a different powder, best seating remains just the same.</p><p>It is independent of tune.</p><p></p><p>If ~50yrs ago they knew just this much about it, then by now we would have our chambers cut to standards for particular bullets, and we could look up on a table exactly where best seating is.</p><p>You know what progress we've made in this regard, for ~100yrs? NONE</p><p>You can go ahead and ask bullet makers for reamer prints and seating tables for their bullets. If they even attempt to skirt around that with folklore & BS, at least know it for what it is: They know no more than you do.</p><p>So your endeavor to understand this is great, but you won't learn anything by asking around. </p><p>It's just the way it is with small arms and humans in general.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1983821, member: 1521"] Bullet seating is no more tuning than primer swapping is. Both are prerequisite to best tune,, they can both take you out of tune, but you cannot actually tune with either. You tune with powder(right to the kernel) and neck tension. Full seating testing, as Berger recommends, is a coarse process to find the land relationship that a bullet likes in YOUR barrel. This cannot be predicted but has to be tested for. JUST LIKE PRIMER SWAPPING. Both cause huge dispersion changes, way beyond that of actual tuning with powder. With full seating testing, you can make a 1/4moa gun open to 3/4moa & back. No amount of powder change(type or amount) can do that, and you will not recover from worst seating or worst primers -with tuning. That's why it's vital, right up front, to determine best bullet seating, and best primer, as prerequisites to tuning. Also, once you have determined best seating with a bullet/barrel, and best primer for powder/cartridge, this does not change. Even if you start load development over with a different powder, best seating remains just the same. It is independent of tune. If ~50yrs ago they knew just this much about it, then by now we would have our chambers cut to standards for particular bullets, and we could look up on a table exactly where best seating is. You know what progress we've made in this regard, for ~100yrs? NONE You can go ahead and ask bullet makers for reamer prints and seating tables for their bullets. If they even attempt to skirt around that with folklore & BS, at least know it for what it is: They know no more than you do. So your endeavor to understand this is great, but you won't learn anything by asking around. It's just the way it is with small arms and humans in general. [/QUOTE]
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Bullet Jump/Jammed - Is it the Bullet design or the rifle
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