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Rifles, Reloading, Optics, Equipment
Reloading
The reason we anneal brass cases.
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<blockquote data-quote="Hugnot" data-source="post: 2030418" data-attributes="member: 115658"><p>I routinely anneal after 3-4 cycles. I use a propane fueled circular/ring tip torch that a bought from the Woodchuck guy back east. I center the junction of neck and shoulder in the center of the ring tip just out side of the reducing part of the flame and toast them for 15 seconds, they sort of first look liquidly then turn dull read. At that point, I tip them over into the 1/2 inch of water to hear them sizzle. After 50 cases, the water (approximately 25 f. oz.) has warmed up from like 40* to over 100* so I know there has been lots of heat energy sucked up from the 1100 or so degree propane flames.</p><p></p><p>I have found that brass that is excessively work hardened has inconsistent neck tensions. For example, I can check out 50 not annealed fired cases for brass spring-back, having equal neck wall thicknesses of .0125, by pushing a bullet into the fired cases - some easily slip fit in other don't. Running the same test for annealed cases using my cheapo technique, the bullet easily slip fits into case necks. Frequently, I see powder residue smudges on the cases, that have not been annealed, that don't allow an easy bullet slip fit - my guess is that the brass contracts just after the bullet is blown out of the brass allowing powder combustion stuff to leak out.</p><p></p><p>New brass should not require annealing. If I had an electron microscope I could look at the crystal structure of the brass and see if my 15 seconds of toasting was adequate to achieve the degree of crystal enlargement desired, but they feel real good upon bullet seating.</p><p></p><p>For my .223 AR15's, I routinely give them I slight crimp with my Lee "Factory" crimp die. I like to shoot long range rodents with .22-.250's and a variety of 6mm's (if you miss there usually will be another one).</p><p></p><p>Edit: I always neck turn brass to prevent excessive working & hardening. The 800ML has been changed to 25 fl. oz. for unit consistency.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2030418, member: 115658"] I routinely anneal after 3-4 cycles. I use a propane fueled circular/ring tip torch that a bought from the Woodchuck guy back east. I center the junction of neck and shoulder in the center of the ring tip just out side of the reducing part of the flame and toast them for 15 seconds, they sort of first look liquidly then turn dull read. At that point, I tip them over into the 1/2 inch of water to hear them sizzle. After 50 cases, the water (approximately 25 f. oz.) has warmed up from like 40* to over 100* so I know there has been lots of heat energy sucked up from the 1100 or so degree propane flames. I have found that brass that is excessively work hardened has inconsistent neck tensions. For example, I can check out 50 not annealed fired cases for brass spring-back, having equal neck wall thicknesses of .0125, by pushing a bullet into the fired cases - some easily slip fit in other don't. Running the same test for annealed cases using my cheapo technique, the bullet easily slip fits into case necks. Frequently, I see powder residue smudges on the cases, that have not been annealed, that don't allow an easy bullet slip fit - my guess is that the brass contracts just after the bullet is blown out of the brass allowing powder combustion stuff to leak out. New brass should not require annealing. If I had an electron microscope I could look at the crystal structure of the brass and see if my 15 seconds of toasting was adequate to achieve the degree of crystal enlargement desired, but they feel real good upon bullet seating. For my .223 AR15's, I routinely give them I slight crimp with my Lee "Factory" crimp die. I like to shoot long range rodents with .22-.250's and a variety of 6mm's (if you miss there usually will be another one). Edit: I always neck turn brass to prevent excessive working & hardening. The 800ML has been changed to 25 fl. oz. for unit consistency. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
The reason we anneal brass cases.
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