How does a JHP (jacketed hollow point) bullet work?

Question

Does it disintegrate upon impact? Does it explode? or what?

Answer 1

Bound's hubby here:

A properly constructed hollow point, used on an appropriate target, will not explode or disintigrate. If the hollow point "explodes", you have either used a hollow point designed for thin skinned varmints on a thick skinned target, or you fired the hollow point at a higher velocity than it was designed for.

You have two types of hollow point: a performance hollow point (designed to expand on game) and a ballistic hollow point (designed to form a "perfect" bullet tip to maximize the ballistic co-efficient [accuracy] of the bullet).

In theory, a ballistic hollow point (such as Sierra's Match King match bullet) will not open up (mushroom) when it hits a flesh target ... small hole in ... small hole out.

A performance hollow point (hunting hollow point) actually starts to expand because of a "hydro-static" reaction to the animal's body fluids. As the hollow point engages the body fluids, the hollow point expands/mushrooms to perhaps more than twice the original diameter of the bullet. The purpose of the hollow point is to generate a larger wound channel which serves 2 purposes. First, a larger wound channel creates more "shock" to the animals nervous system ... which debilitates the animal. Second, the larger wound channel creates a larger source of blood loss with minimal chance of clotting to stop blood flow.

If a hollow point should exit the body, they mushroomed bullet actually minimizes the chance of a ricochet, because of a decrease of remaining energy (due to energy transfer) and a less rounded surface that would facilitate deflection of the bullet upon a hard surface.

Answer 2

A jacketed hollow point bullet is designed to open up or peel back to form a slug that is larger is frontal area than the initial caliber. Each bullet is designed to operate within a given velocity range. If the velocity is too high, the bullet could disintegrate upon impact. If the velocity is too low, it will likely not open properly as it was designed to do. There are many different designs for a hollow point bullet. Each bullet manufacturer has their own design. Some of the variables that make up the different designs are the copper alloy that the jacket is made of, how the inside of the jacket is scored to cause the bullet to open and what the lead alloy is. Other factors are whether the bullet has a partition in the middle and where it is located. A partition is placed in bullets that are designed for use on larger game or thick skinned game. These animals require a bullet with a controlled expansion which gives better penetration prior to expanding. If a bullet expands too soon, it does not penetrate sufficiently to reach vital organs. This results in wounded and lost animals, not to mention the suffering caused by not insuring a clean kill. While these bullets provide a much improved kill probability, they are prohibited for military use by international agreement. All military small arms bullets are full metal jacketed bullets.

Answer 3

Most bullets are designed to expand when it hits flesh and/or bone of some sort (the exception is full metal jacket bullets). Some bullets are made to expand less (controlled expansion bullets) and some bullets are made to expand quickly (hollow point bullets).

The hollow point gives the bullet a "weak spot" to begin expansion.

To think of this another way (collapsing rather than expanding), thing about standing on an aluminum can. If the can is in good shape, once can support me (about 225 pounds) easily. However, if someone knicks the side of the can while I am standing on it, the can collapses. Why? The knick caused a weak spot in the can that allowed the can to begin to collapse. My weight did the rest of the work.

Bullets are designed to "mushroom". They literally are designed to look like a mushroom in the end. A hollow point is typically designed to expand more rapidly than other bullets.

As one poster mentioned, if the bullets hits with a high velocity, the bullet will tend to fragment (explode as you put it). If the bullet hits too slowly (like you shoot at something a long ways away), the bullet will not reach is expansion potential.

When I hunt deer, I used a modified type of hollow point called a Ballistic Tip (it is a essentially a hollow point with a plastic tip that aids in expansion and preserves the shape of the tip of the bullet). I shot a deer with one and hit the shoulder blade at close range. The result looked like I shot the deer with a shotgun. There were multiple holes in the body from the bullet and bone fragmenting (the bullets have been redesigned since then, I believe one of the reasons was to keep things like this from happening).

Another variation of the hollow point is a dum-dum bullet. This is a generic term, but a dum-dum usually referred to a bullet that has an "X" cut in the top. Unlike the hollow point, the "X" was used to make the bullet fragment upon impact.

Hope that answers your question.

Answer 4

Jhp Bullet

Answer 5

a jacketed hollow point bullet is designed to expand more than a typical soft point jacketed bullet. the pressure inside the cavity (upon impact) forces the bullet to expand outward resulting in a larger expansion and transferring more of the bullets energy to the target which results in more damage to the target, hollow points will explode at higher velocity, for example if you were to load a JHP bullet into a .223 wsm cartridge then it will more than likely explode on impact due the much higher pressure created by the higher velocities, with the exception of the new barnes x-bullets, hollow points are intended for low velocity rounds, in lower velocity rounds the hollow pointed bullet allows for more of the bullets energy to be transferred to the target than what a typical JSP (jacketed soft point) would do.

Answer 6

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RE:
How does a JHP (jacketed hollow point) bullet work?
Does it disintegrate upon impact? Does it explode? or what?

Answer 7

The hollow point aids in expansion of the bullet, it creates a larger wound channel thus equalling greater damage. High powered rifle Hollowpoints on the other hand are often going at such great speeds they simply blow up or "fragment" into many small pieces. but when they are going this , often the hollowpoint isn't needed for this effect.

Answer 8

It spreads because of the impacted mass getting into the hole in front.
By spreading it increases its surface area and all the energy is expended on the target. It also means that none of the bullet will emerge from the rear of the target (thus no danger of hitting something other than the intended target, as long as you don't miss).

Answer 9

357 "standard whats that mean?? a 357 can have a JHP and a 357 jhp vs a 38 sp jhp..the 357 wins every time,, so the answer is NO the 38 is not equal to the 357. [same bullet]

Answer 10

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