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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth and Bearing Surface?
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<blockquote data-quote="Garycrow" data-source="post: 1017333" data-attributes="member: 30743"><p>The argument that seating the bullet deeper takes up case capacity is one I've always had a problem with. Case capacity is what it is, the bullet moves so you're not really sacrificing capacity by seating it deeper. As soon as you touch off the round the volume of your case is no longer set by the bullet seating depth so I have a hard time accepting that it's of any consequence when it comes to how much pressure the round will generate. True you can get a bit more powder in the case by seating it out farther but most loads aren't at 100% density anyway so the extra little bit of powder space doesn't come into play. </p><p></p><p>Given my druthers I'll always take the shorter throat for a couple of reasons. First is the desire to have as much bearing surface as possible in the neck, and second is throat erosion as the rifle is shot. With your second dummy round it won't be long before you can't touch the lands at all while still having the bullet in the case, not a good place to be at. If I were having a custom reamer made I'd pick your first dummy round and have it throated for that. If the throat turned out to be too short it's a simple matter for any competent gunsmith to lengthen it with a throating reamer. You can't put the material back after it's been removed.</p></blockquote><p></p>
[QUOTE="Garycrow, post: 1017333, member: 30743"] The argument that seating the bullet deeper takes up case capacity is one I've always had a problem with. Case capacity is what it is, the bullet moves so you're not really sacrificing capacity by seating it deeper. As soon as you touch off the round the volume of your case is no longer set by the bullet seating depth so I have a hard time accepting that it's of any consequence when it comes to how much pressure the round will generate. True you can get a bit more powder in the case by seating it out farther but most loads aren't at 100% density anyway so the extra little bit of powder space doesn't come into play. Given my druthers I'll always take the shorter throat for a couple of reasons. First is the desire to have as much bearing surface as possible in the neck, and second is throat erosion as the rifle is shot. With your second dummy round it won't be long before you can't touch the lands at all while still having the bullet in the case, not a good place to be at. If I were having a custom reamer made I'd pick your first dummy round and have it throated for that. If the throat turned out to be too short it's a simple matter for any competent gunsmith to lengthen it with a throating reamer. You can't put the material back after it's been removed. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth and Bearing Surface?
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