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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7 STW vs 28 Nosler vs 7 RUM according to Nosler's #8 reloading book
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<blockquote data-quote="J E Custom" data-source="post: 1211121" data-attributes="member: 2736"><p>No Problem Marcus. Maybe I can clear it up for you. </p><p></p><p>Belted cases were designed to be chambered under the worst conditions (It was designed by Holland and Holland for the 375) The idea was to be able to headspace a cartridge correctly that was under size so it could fit in a dirty or fouled chamber in an emergency. belted cases are typically much smaller than the chamber. (Much like the cartridges that are small base sized for semi autos to function better) but can still head space properly/safely.</p><p></p><p>When you head space a belted cartridge, Headspace is from the case head to the front of the belt.</p><p>When fired, the case moves back removing any head space and blows the shoulder forward. The case now fits the chamber and has NO headspace. if you neck size only the case wild sit against the shoulder and have what ever the headspace was (.001 to .003) in front of the belt for clearance and not need the belt anymore to position the cartridge.</p><p></p><p>Most belted cartridge shooters neck size only to increase brass life by not over working it. (NOTE: this is not recommended for dangerous game hunting because it defeats the reason for having the belt in the first place). sometimes after many firings or very hot loads a slight full length sizing (Size only enough to chamber the round)may be necessary to chamber the round.</p><p></p><p>There is another advantage to the belt when designing a wildcat. If you head space the parent cartridge correctly, there is no need to jam the bullet into the lands for fire forming. The case is held very close to the bolt (.0005 to .001) and the risk of case head separation is greatly reduced.</p><p></p><p>So with the belted case neck sized only, or slightly sized it is not using the belt to head space. it is using the shoulder to hold the case in the proper position. The type of die makes no difference for this method of sizing.</p><p></p><p>Hope this explains the question. (I am not the best wordsmith).</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1211121, member: 2736"] No Problem Marcus. Maybe I can clear it up for you. Belted cases were designed to be chambered under the worst conditions (It was designed by Holland and Holland for the 375) The idea was to be able to headspace a cartridge correctly that was under size so it could fit in a dirty or fouled chamber in an emergency. belted cases are typically much smaller than the chamber. (Much like the cartridges that are small base sized for semi autos to function better) but can still head space properly/safely. When you head space a belted cartridge, Headspace is from the case head to the front of the belt. When fired, the case moves back removing any head space and blows the shoulder forward. The case now fits the chamber and has NO headspace. if you neck size only the case wild sit against the shoulder and have what ever the headspace was (.001 to .003) in front of the belt for clearance and not need the belt anymore to position the cartridge. Most belted cartridge shooters neck size only to increase brass life by not over working it. (NOTE: this is not recommended for dangerous game hunting because it defeats the reason for having the belt in the first place). sometimes after many firings or very hot loads a slight full length sizing (Size only enough to chamber the round)may be necessary to chamber the round. There is another advantage to the belt when designing a wildcat. If you head space the parent cartridge correctly, there is no need to jam the bullet into the lands for fire forming. The case is held very close to the bolt (.0005 to .001) and the risk of case head separation is greatly reduced. So with the belted case neck sized only, or slightly sized it is not using the belt to head space. it is using the shoulder to hold the case in the proper position. The type of die makes no difference for this method of sizing. Hope this explains the question. (I am not the best wordsmith). J E CUSTOM [/QUOTE]
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7 STW vs 28 Nosler vs 7 RUM according to Nosler's #8 reloading book
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