FN 5.7 vs. Glock 17

I have a five seven. It feels like shooting a 22 mag. It makes a mess of ballistic gellatin. The ballistic tip ammo that is not supposed to penetrate body armor in fact blows through level 2a. We took some 2a vest panels to the pd range and shot through them like paper with the non a.p. ammo.
 
Yeah, I just watch a video where the guy compared the Keltec PMR30 to the FN 5.7 by shooting at body armor level 2 over a gel torso. The .22 mag almost made it out of the vest!
 
+P loadings are going to tend to work over your pistol. The
5.7 is designed to shoot that velocity with standard FN rounds.

The 11 folks who took CBM hits from a 5.7 , at the Fort Hood
Massacre might have something to say about
the effectiveness of the round. Oh, wait, no, er, THEY ALL DIED.

But it doesn't really seem fair to try to compare any pistol to one
that costs 3 times as much, and is built by FN. I guess you don't
lose much, if you run hot loads thru the cheaper gun, if it makes
you feel better. Just wear the proper safety equipment. Polymer
guns have a way of cracking under heightened stress.
 
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I have a five seven. It feels like shooting a 22 mag.
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Because, it basically is a .22Mag. about 200fps or so faster.

So the stats for some Amercian eagle 5.7 40 grain ammo is 1655 fps with 243 ft. pounds ME.
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Ballistics by the Inch shows .22 Mag loads from a 5" barrel giving 1474s fps with a 40gr and 1672 and 1723fps for a couple of 30gr loads.

I couldn't find any short barrel data for the .22 Hornet, but from a 10" barrel it moves a 40gr at 2400fps. Now, think about that...the Hornet, from a 5" barrel would still be moving pretty quick, probably a bit faster than the 5.7mm, certainly no slower.

Who recommends the .22 Hornet for self defense???

(waits while listening to the crickets chirp......)

NO ONE.

The 11 folks who took CBM hits from a 5.7 , at the Fort Hood
Massacre might have something to say about
the effectiveness of the round. Oh, wait, no, er, THEY ALL DIED.
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While the victims did die, as an argument for the effectiveness of the 5.7 round, this is BS.

Ask any of the uncountable thousands of people who have been shot with a .22 rimfire, and died, about the "effectiveness" of those rounds.

Given the choice, I always opt for the broadsword, over the icepick.
 
I think the title of the post might be why people are a bit off topic
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Maybe, but that's only if people read the title only and jump to the conclusions. I was very clear in my opening statement that this was a hypothetical question and did not want it to get to an debate about caliber or why.

My main question was:
could you get the same low recoil effect with a comprable load?
 
To answer that, the effects of the 5.7 are essential to the discussion. You have to know what it can do to know if you can match it.
 
"could you get the same recoil effect with a comparable load?"

What you are trying to do is take a round with heavier recoil,
than the 5.7x28mm (9mm)
and use a higher pressure round, 9mm +P, and somehow expect
lower recoil than the standard 9mm round? I shoot the
5.7, and a few full-size 9mm pistols, and I'm going to say no.
 
To answer that, the effects of the 5.7 are essential to the discussion. You have to know what it can do to know if you can match it.
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No, for plinking and practice, target, etc. the EFFECTS of the bullet are not the same as the recoil effect. Two different matters. The first being concerned with the results at the target, and the second being the effects of the load on recoil.

Not everything we do in shooting has to be related to actual SD.
I already have that worked out for my personal needs.
 
What you are trying to do is take a round with heavier recoil,
than the 5.7x28mm (9mm)
and use a higher pressure round, 9mm +P, and somehow expect
lower recoil than the standard 9mm round? I shoot the
5.7, and a few full-size 9mm pistols, and I'm going to say no.
Click to expand...

So you are saying that a 50 grain bullet going at example 1600 fps out of a 9mm is going to be very different than a 50 grain bullet going at 1600 fps out of a FN 5.7? I know this is hypothetical, because the example I posted was a 60 grain 9MM, but just trying to keep it the same for theoretical sake.

Up to now, I had never heard of a 60 grain 9mm load, but appartenly since Liberty and Double tap both make a similar load, there must be some reason for them.
 
So, bear in mind you are competing with a 40 grain 5.7mm spitzer shaped bullet,
as compared to the 60 grain 9mm FMJ or HP shaped bullet, jacked to +p pressures.

Wouldn't be the first time I was wrong, but it seems the more you tweak this
thing, the farther from your goal you're going to get.

Is there a benefit, or useful goal, here? Not to saw "why do you need it?",
but even if you did match recoil and velocity, the 9mm is still not going
to perform in a similar manner to the 5.7, due to it's size and shape
disparity. You'll shed velocity quicker, due to sectional density, and overall size
and blunt shape will negate penetration advantage.
 
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American Eagle isn't the defensive round, SS198 is, and there is a big difference.

Keep in mind the 5.7 round was designed to replace the 9mm as a more effective NATO cartridge. In NATO testing, the 5.7 proved to be superior and the winner of the trials. The only reason it wasn't adopted was due to politics, as Germany wanted H&K to win. So between equal form factors, I would choose the Five-seveN over a Glock hands down.
 
I like the 9mm round, per se'. It has performed well for over a century, and has proved itself, IMO, a feat of German Engineering. At +P, a 60 grain round might be very
accurate at 50 yards +, for one thing. Maybe a 9mm Glock long slide.
 
I think the 7.62x25 Tokarev round offers a better format than either the 5.7 or the 9mm.
In standard ball form, the Tok penetrates things the other standard rounds bounce off, like Kevlar helmets. Imagine if the sold copper round technology was extended to that 30cal Tok case with a hot load.
 
To the original question 'can you get a 9mm to behave like a 5.7' the simple answer is no, they are very different ammo types. As noted Liberty Civil Defense is the closest you can get. It's a shame there aren't more firearms in the 5.7 format as it's a very nice shooting round.
 
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