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Hunting
The Basics, Starting Out
Generalized bullet selection for hunting….
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<blockquote data-quote="nksmfamjp" data-source="post: 2568932" data-attributes="member: 1951"><p>What is a bullet post without a discussion of energy! First there are newtons laws.</p><p></p><p></p><p></p><p> The energy you see on a box of ammo or ballistic calculator is kinetic energy. I want you to think of that number as battery capacity.</p><p></p><p>When a bullet flys through the air, it loses energy to the air because it loses velocity…..due to drag(heating), etc. When it hits the animal, it loses energy due to energy transformation. It uses the animal to expand the bullet(work) and that further increases energy transfer in the way of hydraulic and hydrostatic shock to the animal. So the work being done on the bullet and on the animal are creating a huge temporary and permanent wound cavity. Then something exits. If you could measure weight and velocity exiting, you would know how much energy was lost into the animal. That is the energy number you want. The amount of energy put into work in the animal.</p><p></p><p>We don't know that….unless the bullet stops Inside the animal. This can be effective, but really doesn't leave a blood trail or enough holes for blood to exit. I'm not a medical professional, but it seems like when bullets don't exit, animals can maintain blood pressure for just a few moments longer. This can allow them to escape. On a poor shot, then can go a long ways…days, weeks… on a good shot they can just drop dead or last long enough to be hard to find. Tracking blood from an exit makes this easier.</p><p></p><p>This is why I think bullet exit to be a key factor. Bullets that exited always made for easy tracking and quick death. Bullets that didn't exit always required a follow up shot…..often times nearly losing the animal.</p><p></p><p>Back to reality. This is why energy is meaningless. You just need to know at what velocity range will it expand. A bullet that holds together and expands will exit usually. An exit will bleed well usually.</p><p></p><p>Generally, the only time this is not true is when bullet diameters get big or velocities are low. This is generally the case for hard cast loads or solids. A 500gr bullet at 2200fps lengthwise through an elephant needs to be a solid to ensure exit. A mono could work, but may not exit.</p><p></p><p>A bullet used for double shoulder shots ought to be a mono or something very tough to get that exit through big bones. Sometimes you hit both big bones! IMO, a mono can do that. I don't think a match bullet can. I have been lucky enough to never hit both big bones on a shoulder shot.</p><p></p><p>In essence, this is what the bonded cup&core designs as well as mono's are doing. They hold together enough to penetrate through to exit in tough big boned animals.</p></blockquote><p></p>
[QUOTE="nksmfamjp, post: 2568932, member: 1951"] What is a bullet post without a discussion of energy! First there are newtons laws. The energy you see on a box of ammo or ballistic calculator is kinetic energy. I want you to think of that number as battery capacity. When a bullet flys through the air, it loses energy to the air because it loses velocity…..due to drag(heating), etc. When it hits the animal, it loses energy due to energy transformation. It uses the animal to expand the bullet(work) and that further increases energy transfer in the way of hydraulic and hydrostatic shock to the animal. So the work being done on the bullet and on the animal are creating a huge temporary and permanent wound cavity. Then something exits. If you could measure weight and velocity exiting, you would know how much energy was lost into the animal. That is the energy number you want. The amount of energy put into work in the animal. We don’t know that….unless the bullet stops Inside the animal. This can be effective, but really doesn’t leave a blood trail or enough holes for blood to exit. I’m not a medical professional, but it seems like when bullets don’t exit, animals can maintain blood pressure for just a few moments longer. This can allow them to escape. On a poor shot, then can go a long ways…days, weeks… on a good shot they can just drop dead or last long enough to be hard to find. Tracking blood from an exit makes this easier. This is why I think bullet exit to be a key factor. Bullets that exited always made for easy tracking and quick death. Bullets that didn’t exit always required a follow up shot…..often times nearly losing the animal. Back to reality. This is why energy is meaningless. You just need to know at what velocity range will it expand. A bullet that holds together and expands will exit usually. An exit will bleed well usually. Generally, the only time this is not true is when bullet diameters get big or velocities are low. This is generally the case for hard cast loads or solids. A 500gr bullet at 2200fps lengthwise through an elephant needs to be a solid to ensure exit. A mono could work, but may not exit. A bullet used for double shoulder shots ought to be a mono or something very tough to get that exit through big bones. Sometimes you hit both big bones! IMO, a mono can do that. I don’t think a match bullet can. I have been lucky enough to never hit both big bones on a shoulder shot. In essence, this is what the bonded cup&core designs as well as mono’s are doing. They hold together enough to penetrate through to exit in tough big boned animals. [/QUOTE]
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