JSP vs JHP....

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Super-Dave

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I was wondering why jsp's are not as popular as jhp's for self defense.

It seems to me with current metalurgy technology a jsp can be made to work just as well as a jhp. And I think manufacturing cost would be less with a jsp.
 
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What kind of application are you talking about - self-defense, medium game, large game? Pistol? Rifle?

Metallurgy notwithstanding, I don't think you'll ever match the expansion of JHP bullets with a JSP design, but that may not be what you're looking for, depending on your application.
 
In 40+ years of shooting, I've never figured out what JSPs are good for.

For shooting heavy bullets (large game hunting rounds), a hard lead bullet with a gas check seems superior. For anything (or anyone) else, a JHP should work better. But I have an open mind....
 
a hollow point uses water scooped up into the cavity to blow out that thin layer of lead and gilding metal, and expansion should start within the first inch of penetration.

A soft point uses lead to force open the mushroom. There is absolutely no way a soft point would perform like a hollow point unless the metal in it was as soft as toothpaste.

Even if a hollow point fails to perform, if it has enough exposed lead, the front end will still collapse, and can form a mushroom. Soft point bullets at low velocity just can't do this at low speeds, early in the bullet path.

You're not far wrong, though. there are companies who make defensive bullets that stress penetration that have only token hollow points.
 
In 40+ years of shooting, I've never figured out what JSPs are good for.
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If you are limited to shooting factory rounds, then this is about as good as you are going to get for hunting without having to special order the Buffalo Bore stuff. I can usually find JSPs at local shops. I would never be able to find hard cast ammo locally.
 
OK. The pictures below are of cast bullets I've made and/or hand loaded and what they looked like after firing. All these are fired from a .357 into a 24" deep bullet trap consisting of shredded rubber mulch. Ballistics gel it ain't; but the penetration/expansion of the 158 grain sjhp is very similar to published results of the same bullet in gel.

Pic one is the 358156 Lymann bullet cast in near pure lead with just enough tin to get fillout in the mold. This is dead soft lead and is nearly identical in performance to the 158 grain jsp.

GCdBoolit.jpg


Now the same bullet recovered from the mulch, penetrated 22" into the mulch and deformed a bit with slight expansion to .42" MV=1262 fps ( I'm NOT impressed)

20080926003.jpg


Now, here are pics of a the same cast bullet that I hollow pointed to similar depth and width as factory ammo. In the pic are 4 recovered bullets. The lower left was recovered from 18" into the trap..this was a 38 special soft swagged lead hollow point launched at a mere 750 fps from a snub nose revolver (are you impressed with the expansion? I'm not.)

The lower right is a Fiocci 148gr (ADVERTIZED as 1500fps but chronographed at 1150fps) 13" with fair expansion. The upper left was the magtech 158gr sjhp at 1200fps with 16"penetration and .59" expansion The upper right is my home brew hollow point boolit at 1250fps, 17" penetration and expansion to .62"

Expansioncomparison.jpg


Here's a side view of the 3 that actually expanded.
FioccivsMagtechvshomebrew.jpg


And finally, if you want the ultimate in penetration here is the hard cast 185 grain LBT style boolit that I use for thick skinned game (this I have taken A wild pig 250# from 50 yards...through and through penetration. Penetrates all 24" in the bullet trap and dents the arresting plate (1230fps)
Beartooth-1.jpg


I think your wasting your time if you are on the vain quest for the "magic bullet" If you want expansion, jacketed or not, you need three things (Barnes bullets notwithstanding): 1 soft lead, 2 wide hollow point, and 3 Enough velocity to make the bullet expand....the mass of the bullet will help with penetration. You seem to be over-thinking all this. Get out to the range and start shooting.
 
I also suspect that JSPs are better suited to cartridges used in revolvers. It seems to me that a JSP fired in an auto-loader would be somewhat prone to deforming when feeding, or to deforming in the magazine and affecting feeding. Off hand I can't think of any common cartridges designed for use in auto-loaders that are commercially available with JSP bullets.
 
Super-Dave said:
Here are some JSP made by Federal for 9mm
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However --

[1] They are not currently in the standard Federal line; and

[2] According to the catalog blurb, they are extremely rare and were specially made for a particular customer.
 
I'm curious why somone would want to make a JSP that performs like a JHP?

I use JSP's in my .45 Colts for hunting, simply because they're more accurate from my firearms. My handgun will do the lead ok, but my rifle doesn't like lead at all. They both shoot more accurately with JSP's, if only slightly for the handgun. I want and expect a JSP to penetrate deeper, and a JHP to expand faster.

So I'm shaking my head wondering why one would want to make one perform like the other?

Daryl
 
Super Dave

I was wondering why jsp's are not as popular as jhp's for self defense.
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I was wondering why you do nothing but post question after question, day after day...the vast majority of which are self-evident, and nearly all of which could be answered easily by a quick search.

By quick count, 334 posts since 01 Jan of this year, almost every one of which is a question that would easily be answered by the aforementioned search.

Is this a game?
 
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By quick count, 334 posts since 01 Jan of this year, almost every one of which is a question that would easily be answered by the aforementioned search.

Is this a game?
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Looks that way, I start to answer, and the realize who's asking the question.

Honestly Super-Dave, I think you know the answers to your questions, and I think by now, you should.

No offense, but........
 
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