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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
What learned over time building AR's
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<blockquote data-quote="budlight" data-source="post: 3088877" data-attributes="member: 2939"><p>Both over un under rpm are bad. Look it up on the internet. </p><p></p><p>Friction heat does cause the internal lead of a copper jacketed bullet to become liquid in very high velocity rounds. It explains why varmint rounds can devistate small critters. rotating at rpm over 250,000 on impact the fragments can disperse at almost 90 degrees.</p><p></p><p>When I was kid and given a 26 inch 22-250 and I was hot loading I had 50 ish grain hp bullets come apart on the way to target. Because bullets of that era were not designed for high 3000 fps. I lived near seirra bullets and talked to them and they sold me bullet designed for the 22-250 and 220 swift. The 22-250 could have been a great round if they would have understood twist rates and the advent of heavier and heavier .224 bullets</p></blockquote><p></p>
[QUOTE="budlight, post: 3088877, member: 2939"] Both over un under rpm are bad. Look it up on the internet. Friction heat does cause the internal lead of a copper jacketed bullet to become liquid in very high velocity rounds. It explains why varmint rounds can devistate small critters. rotating at rpm over 250,000 on impact the fragments can disperse at almost 90 degrees. When I was kid and given a 26 inch 22-250 and I was hot loading I had 50 ish grain hp bullets come apart on the way to target. Because bullets of that era were not designed for high 3000 fps. I lived near seirra bullets and talked to them and they sold me bullet designed for the 22-250 and 220 swift. The 22-250 could have been a great round if they would have understood twist rates and the advent of heavier and heavier .224 bullets [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
What learned over time building AR's
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