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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Short necks=short throat life??
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<blockquote data-quote="Bob S." data-source="post: 57999" data-attributes="member: 2927"><p>Good question. I am certainly not an expert but wasn't the swifts reputation for burning out throats because of the powder used at the time? Longer neck than the 22-250 now comparable barrel life with the modern powders. I think the overall geometry/pressure has to do with how fast stuff burns out. Neck length certainly is a part of it but is not the only consideration. Seems that as we stretch the case capacity we sharpen the shoulder angle and shorten the neck so we can maximize velocity/pressure by using "more" hotter faster burning powders. Fast/reliable/cheap - pick any two. I'm not a smith but how does throat taper change when a cartridge is "improved"? Does it correlate to neck length? case diameter vs bullet diameter? Faster taper - less surface area - bigger effect any erosion will have?</p></blockquote><p></p>
[QUOTE="Bob S., post: 57999, member: 2927"] Good question. I am certainly not an expert but wasn't the swifts reputation for burning out throats because of the powder used at the time? Longer neck than the 22-250 now comparable barrel life with the modern powders. I think the overall geometry/pressure has to do with how fast stuff burns out. Neck length certainly is a part of it but is not the only consideration. Seems that as we stretch the case capacity we sharpen the shoulder angle and shorten the neck so we can maximize velocity/pressure by using "more" hotter faster burning powders. Fast/reliable/cheap - pick any two. I'm not a smith but how does throat taper change when a cartridge is "improved"? Does it correlate to neck length? case diameter vs bullet diameter? Faster taper - less surface area - bigger effect any erosion will have? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Short necks=short throat life??
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