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Long Range Hunting & Shooting
7mm-300win thoughts
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<blockquote data-quote="fmajor" data-source="post: 969249" data-attributes="member: 20646"><p>That's some *serious* smackdown!!!!</p><p> </p><p>I'm all for 7mm's and the 7mm/300 Win (it will be my next build) in particular and a strong proponent for long range hunting, but to me the thing that's tough to get to is retained <strong><u>inertia</u></strong>. </p><p> </p><p>What I'm thinking of is not simply retained energy; Rather, a projectiles ability to continue penetrating through heavy, energy sapping material. For example, like a poorly hit/angling away elk with a full stomach of ground up, moist grass/hay at (for the sake of illustration) 1,400-1,500yds. </p><p> </p><p>A 220 Swift may be able to break a bone, but certainly wouldn't penetrate all the way through whereas a 20mm Vulcan round would be able to not just break the bone, but would have enough retained inertia to continue on through the elk in the conditions set above.</p><p> </p><p>So really, the question is how much energy/BC/velocity/etc is needed to ensure a projectile could slam through the entire length of a large elk to unquestionably destroy vital organs and create a significant wound channel? Sure, a 20mm Vulcan round would undoubtedly accomplish that, but otherwise how much is actually needed?</p><p> </p><p>Retained energy at the point of strike/impact is one thing and has a "simpler" mathematic path derived from initial velocity, projectile weight, projectile twist rate, BC (which is comprised of diameter/weight/drag coefficient, etc) and probably a few other variables I've forgotten. But I don't think that's all there is to the "penetration puzzle".</p><p> </p><p>However, calculating how much inertia a given projectile will loose (in a given medium) is (for my simple mind) more elusive to calculate. I've read on this topic for a few decades so it's not a flippant question/topic, but since I'm not a mathematician/ballistician I simply don't have the necessary tools to begin to arrive at a solution.</p><p> </p><p>Sorry if this is a de-rail.... I'm hoping to learn as well as pose questions which may require a fresh look/approach...</p></blockquote><p></p>
[QUOTE="fmajor, post: 969249, member: 20646"] That's some *serious* smackdown!!!! I'm all for 7mm's and the 7mm/300 Win (it will be my next build) in particular and a strong proponent for long range hunting, but to me the thing that's tough to get to is retained [B][U]inertia[/U][/B]. What I'm thinking of is not simply retained energy; Rather, a projectiles ability to continue penetrating through heavy, energy sapping material. For example, like a poorly hit/angling away elk with a full stomach of ground up, moist grass/hay at (for the sake of illustration) 1,400-1,500yds. A 220 Swift may be able to break a bone, but certainly wouldn't penetrate all the way through whereas a 20mm Vulcan round would be able to not just break the bone, but would have enough retained inertia to continue on through the elk in the conditions set above. So really, the question is how much energy/BC/velocity/etc is needed to ensure a projectile could slam through the entire length of a large elk to unquestionably destroy vital organs and create a significant wound channel? Sure, a 20mm Vulcan round would undoubtedly accomplish that, but otherwise how much is actually needed? Retained energy at the point of strike/impact is one thing and has a "simpler" mathematic path derived from initial velocity, projectile weight, projectile twist rate, BC (which is comprised of diameter/weight/drag coefficient, etc) and probably a few other variables I've forgotten. But I don't think that's all there is to the "penetration puzzle". However, calculating how much inertia a given projectile will loose (in a given medium) is (for my simple mind) more elusive to calculate. I've read on this topic for a few decades so it's not a flippant question/topic, but since I'm not a mathematician/ballistician I simply don't have the necessary tools to begin to arrive at a solution. Sorry if this is a de-rail.... I'm hoping to learn as well as pose questions which may require a fresh look/approach... [/QUOTE]
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