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Rifles, Reloading, Optics, Equipment
Reloading
Can a load change its accuracy with time?
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<blockquote data-quote="MagnumManiac" data-source="post: 2179363" data-attributes="member: 10755"><p>Ok, here is the reason that this rarely occurs with factory ammo.</p><p>They blend a fast powder that gives them the ballistics they want. The reason they do this is two fold; firstly, it costs less to use less powder, secondly, they know that a crimped round with a faster powder produces a smooth curve under MAP due to a high start pressure. This has been known ever since smokeless powders has been used. This is why factory ammo can work in many different firearm types.</p><p>The only difference to this is Cordite. It is NOT a progressive powder, it had to be used as long strands to slow the burn.</p><p>Factory ammo, generally speaking, has a fair amount of air space, this type of charge doesn't change from transporting and handling, but compressed loads, even slight ones, can change.</p><p>Hope this clears this up.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2179363, member: 10755"] Ok, here is the reason that this rarely occurs with factory ammo. They blend a fast powder that gives them the ballistics they want. The reason they do this is two fold; firstly, it costs less to use less powder, secondly, they know that a crimped round with a faster powder produces a smooth curve under MAP due to a high start pressure. This has been known ever since smokeless powders has been used. This is why factory ammo can work in many different firearm types. The only difference to this is Cordite. It is NOT a progressive powder, it had to be used as long strands to slow the burn. Factory ammo, generally speaking, has a fair amount of air space, this type of charge doesn’t change from transporting and handling, but compressed loads, even slight ones, can change. Hope this clears this up. Cheers. [/QUOTE]
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Reloading
Can a load change its accuracy with time?
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