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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm Rem. Mag vs. .308 Winchester
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<blockquote data-quote="Michael Eichele" data-source="post: 30609" data-attributes="member: 1007"><p>VH,</p><p></p><p>You are correct in that same bullet styles and same weight 30 vs 7mm, the BC of the 7mm will always be higher than the 30 cal. </p><p></p><p>The point I was trying to make is that the 175 SMK for 30 cal is around .500 BC the 168 SMK for the 7mm is .488 BC Because of the bigger bore and therefore more gas expansion in the 30 cal you can drive the 175 some what faster out of a 300 winchester than you could a 168 grain bullet from a 7mm rem mag. Because of the burn increase in the bigger barrel and the same barrel length the 300 will be faster with heavier bullets. These cases are near identical, yet the 300 win mag would be king.</p><p></p><p>Also typically in a 30 cal rifle you dont need an 8 or 9 twist. This equals less twisting torque upon recoil.</p><p></p><p>Thanx for the support DK <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>PS This is what works for me and only my personal view poin on the pros and cons of the 30 vs 7mm There is no offence meant here to 7mm fans! There are great arguments in this topic from both sides.</p><p> <img src="http://images/icons/smile.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>[ 01-17-2004: Message edited by: meichele ]</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 30609, member: 1007"] VH, You are correct in that same bullet styles and same weight 30 vs 7mm, the BC of the 7mm will always be higher than the 30 cal. The point I was trying to make is that the 175 SMK for 30 cal is around .500 BC the 168 SMK for the 7mm is .488 BC Because of the bigger bore and therefore more gas expansion in the 30 cal you can drive the 175 some what faster out of a 300 winchester than you could a 168 grain bullet from a 7mm rem mag. Because of the burn increase in the bigger barrel and the same barrel length the 300 will be faster with heavier bullets. These cases are near identical, yet the 300 win mag would be king. Also typically in a 30 cal rifle you dont need an 8 or 9 twist. This equals less twisting torque upon recoil. Thanx for the support DK [img]images/icons/grin.gif[/img] PS This is what works for me and only my personal view poin on the pros and cons of the 30 vs 7mm There is no offence meant here to 7mm fans! There are great arguments in this topic from both sides. [img]images/icons/smile.gif[/img] [ 01-17-2004: Message edited by: meichele ] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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7mm Rem. Mag vs. .308 Winchester
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