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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
True barrel length question for those in “the know”!!!
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<blockquote data-quote="yorke-1" data-source="post: 2062272" data-attributes="member: 11960"><p>It seems like you're over thinking this. Just pick the barrel length that feels/looks good to you and go with it.</p><p></p><p>As far as the idea of getting the optimal powder burn, don't get too hung up on that. Here are the predicted differences in the percentage of powder burned and burn efficiency of a 308 Win using the pretty standard load of 45.5gr of Varget and a 168 SMK in 18", 20", and 45.4" barrels. The images also show the actual bullet travel (based on a SAAMI spec chamber).</p><p></p><p><img src="https://i.imgur.com/JsfU9k1.jpg?1" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/PbFzcln.jpg?1" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><img src="https://i.imgur.com/Y4cGkT0.jpg?1" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>You need a 45.4" barrel to get a 100% powder burn. You give up very little, even with an 18" barrel.</p></blockquote><p></p>
[QUOTE="yorke-1, post: 2062272, member: 11960"] It seems like you're over thinking this. Just pick the barrel length that feels/looks good to you and go with it. As far as the idea of getting the optimal powder burn, don't get too hung up on that. Here are the predicted differences in the percentage of powder burned and burn efficiency of a 308 Win using the pretty standard load of 45.5gr of Varget and a 168 SMK in 18", 20", and 45.4" barrels. The images also show the actual bullet travel (based on a SAAMI spec chamber). [img]https://i.imgur.com/JsfU9k1.jpg?1[/img] [img]https://i.imgur.com/PbFzcln.jpg?1[/img] [img]https://i.imgur.com/Y4cGkT0.jpg?1[/img] You need a 45.4" barrel to get a 100% powder burn. You give up very little, even with an 18" barrel. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
True barrel length question for those in “the know”!!!
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