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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrle Length...
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<blockquote data-quote="The Surgeon" data-source="post: 559567" data-attributes="member: 36761"><p>Looking at Liljas data it shows the the 250 gr projectile has an optimum barrel length of 42 & 44 inches in regards to velocity, any longer and the projectile begins to drop in velocity.</p><p></p><p>Now looking at the same data, the 300 gr is still gaining in velocity at these lengths. This is very interesting, because the only change in variables is the weight of the projectile.</p><p></p><p>I would expect just the opposite in velocities vs the 250 and the 300 gr bullets. But according to the data provided, it is not the case. By that I mean the 300 is still climbing in velocity at 46 inches where as the 250 is falling off. Why?</p><p></p><p>According to Lilja the increase in performance for the 300 was based on a heavier projectile, slow burn powder, and a longer barrel will equal an increase in overall velocity. Looking at the data on the 320 gr this theory does not apply.</p></blockquote><p></p>
[QUOTE="The Surgeon, post: 559567, member: 36761"] Looking at Liljas data it shows the the 250 gr projectile has an optimum barrel length of 42 & 44 inches in regards to velocity, any longer and the projectile begins to drop in velocity. Now looking at the same data, the 300 gr is still gaining in velocity at these lengths. This is very interesting, because the only change in variables is the weight of the projectile. I would expect just the opposite in velocities vs the 250 and the 300 gr bullets. But according to the data provided, it is not the case. By that I mean the 300 is still climbing in velocity at 46 inches where as the 250 is falling off. Why? According to Lilja the increase in performance for the 300 was based on a heavier projectile, slow burn powder, and a longer barrel will equal an increase in overall velocity. Looking at the data on the 320 gr this theory does not apply. [/QUOTE]
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Barrle Length...
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