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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet lethality: energy and velocity
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<blockquote data-quote="MTbackwoods" data-source="post: 1902841" data-attributes="member: 113441"><p>We have our answer ladies and gentlemen! Lol. Fair enough. As for a specific caliber, I don't really want to restrict the conversation in that way. Some guys use 6.5 or 7mm and others .308 or .338. If you were to use a Berger VLD in all of those calibers, at an impact velocity of say 2,000 FPS, you are going to see pretty similar results. Given that the projectile is in the same class as far as weight by caliber. Now granted, the larger diameter bullet should have an advantage to a degree because of mass. However, the actual physical performance of the bullets should be pretty similar in the soft tissue. The .338 should have a larger damage field because of more physical mass to shed, but let's assume sectional density is near identical for all 4 bullets. On game performance should be reasonably similar. Not identical, but similar. Where my interest comes in, is where each of those bullets at the same velocity would have different levels of energy. The .338 is going to have substantially more energy to dump due to mass. Therefore one could be safe in assuming the .338 would have a higher probability of a "dropped" animal than the 6.5 with identical velocities and shot placement. And let's say high shoulder for shot placement. So rather than saying "use the largest caliber possible". I want to know where the cutoff point COULD be for any caliber with similar bullets depending on energy. Obviously if a bullet has 2,000 ft/lbs of energy but only 1,400 FPS when it needs 1,800 FPS to open reliably, one must make his cutoff point where the bullet reaches 1,800 FPS. But on the flip side, the smaller bullet could still have 2,000 FPS but only be carrying 800 ft/lbs of energy. Would we then need to make the cutoff point where the bullet had 1,000 ft/lbs or 1,200 for/lbs?</p></blockquote><p></p>
[QUOTE="MTbackwoods, post: 1902841, member: 113441"] We have our answer ladies and gentlemen! Lol. Fair enough. As for a specific caliber, I don’t really want to restrict the conversation in that way. Some guys use 6.5 or 7mm and others .308 or .338. If you were to use a Berger VLD in all of those calibers, at an impact velocity of say 2,000 FPS, you are going to see pretty similar results. Given that the projectile is in the same class as far as weight by caliber. Now granted, the larger diameter bullet should have an advantage to a degree because of mass. However, the actual physical performance of the bullets should be pretty similar in the soft tissue. The .338 should have a larger damage field because of more physical mass to shed, but let’s assume sectional density is near identical for all 4 bullets. On game performance should be reasonably similar. Not identical, but similar. Where my interest comes in, is where each of those bullets at the same velocity would have different levels of energy. The .338 is going to have substantially more energy to dump due to mass. Therefore one could be safe in assuming the .338 would have a higher probability of a “dropped” animal than the 6.5 with identical velocities and shot placement. And let’s say high shoulder for shot placement. So rather than saying “use the largest caliber possible”. I want to know where the cutoff point COULD be for any caliber with similar bullets depending on energy. Obviously if a bullet has 2,000 ft/lbs of energy but only 1,400 FPS when it needs 1,800 FPS to open reliably, one must make his cutoff point where the bullet reaches 1,800 FPS. But on the flip side, the smaller bullet could still have 2,000 FPS but only be carrying 800 ft/lbs of energy. Would we then need to make the cutoff point where the bullet had 1,000 ft/lbs or 1,200 for/lbs? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Bullet lethality: energy and velocity
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