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Long Range Hunting & Shooting
What blew up my gun?
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<blockquote data-quote="keithcandler" data-source="post: 1709016" data-attributes="member: 3728"><p>JE Custom, I respect your knowledge and comments, always. </p><p></p><p>After living out West for 30 years, I had never seen "cold welding", then moved back South. I have seen this cold welding twice in the last 10 years with my own ammo. </p><p> </p><p>N133 in 223 and 223AI loaded in IMI cases. </p><p></p><p>The bullets were welded solid to the brass case. I pulled the bullets, and some of the powder had turned to what looked like some kind of mold attached to the base of the bullet. Obviously, there was a chemical reaction of some kind between the brass, bullet, which caused a degradation of the powder.</p><p></p><p>I hate to think of what would have happened if I had actually tried to fire any of those rounds.</p><p></p><p>I can't prove it, but I suspect that living in very high humidity climate has had something to do with the cold welding, but that is a WAG at best.</p><p></p><p>I also saw cold welding on Rem 7 Mag brass, fired brass, loaded with IMR 4350 with 140g Nosler ballistic tips. I have had a habit of loading 100 cases, leaving all but 20-40 seated very long so all that is needed is to measure the throat length and seat according to new OAL taking in to account the throat growth. I had a round have an audible POP sound when I seated it, and pulled the bullet. Case neck and bullet look as if I had dipped them in battery acid. My cases are not exposed to anything other than Walnut shell with no additives, lubed with Imperial Sizing wax to FL size.</p><p></p><p>I keep my ammo "fresh" from year to year now.</p><p></p><p>Many ammo companies use a product called Black Lucas in the case neck to eliminate cold welding.</p></blockquote><p></p>
[QUOTE="keithcandler, post: 1709016, member: 3728"] JE Custom, I respect your knowledge and comments, always. After living out West for 30 years, I had never seen "cold welding", then moved back South. I have seen this cold welding twice in the last 10 years with my own ammo. N133 in 223 and 223AI loaded in IMI cases. The bullets were welded solid to the brass case. I pulled the bullets, and some of the powder had turned to what looked like some kind of mold attached to the base of the bullet. Obviously, there was a chemical reaction of some kind between the brass, bullet, which caused a degradation of the powder. I hate to think of what would have happened if I had actually tried to fire any of those rounds. I can't prove it, but I suspect that living in very high humidity climate has had something to do with the cold welding, but that is a WAG at best. I also saw cold welding on Rem 7 Mag brass, fired brass, loaded with IMR 4350 with 140g Nosler ballistic tips. I have had a habit of loading 100 cases, leaving all but 20-40 seated very long so all that is needed is to measure the throat length and seat according to new OAL taking in to account the throat growth. I had a round have an audible POP sound when I seated it, and pulled the bullet. Case neck and bullet look as if I had dipped them in battery acid. My cases are not exposed to anything other than Walnut shell with no additives, lubed with Imperial Sizing wax to FL size. I keep my ammo "fresh" from year to year now. Many ammo companies use a product called Black Lucas in the case neck to eliminate cold welding. [/QUOTE]
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