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Rifles, Reloading, Optics, Equipment
Reloading
What is causing this dent below the shoulder on my Ackley Improved cases?
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<blockquote data-quote="Hugnot" data-source="post: 2664279" data-attributes="member: 115658"><p>Most likely trapped air. Brass is soft being annealed at that area& thin at just below shoulder. Upon pushing the Ackley improved brass case having almost no taper into the die, air is trapped (many psi) between shoulder & side of the brass causing a dent. Case lube also prevents air from escaping.</p><p></p><p>The fixes are using a die with a vent hole or using the minimum amount of lube near the bottom of the case and extending the sizing time to about 1 minute per case to allow air to escape.</p><p></p><p>Attached is a pic of a Foster F/L having vent hole.</p><p></p><p>[ATTACH]410547[/ATTACH]</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2664279, member: 115658"] Most likely trapped air. Brass is soft being annealed at that area& thin at just below shoulder. Upon pushing the Ackley improved brass case having almost no taper into the die, air is trapped (many psi) between shoulder & side of the brass causing a dent. Case lube also prevents air from escaping. The fixes are using a die with a vent hole or using the minimum amount of lube near the bottom of the case and extending the sizing time to about 1 minute per case to allow air to escape. Attached is a pic of a Foster F/L having vent hole. [ATTACH alt="IMG_1851.JPG"]410547[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
What is causing this dent below the shoulder on my Ackley Improved cases?
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