Tried a penetration test with my Five-Seven today. Just using milk jugs, nothing too professional. Looks like at 30 feet the 5.7 round would penetrate 2 milk jugs and enter the 3rd. About 14-15 inches of penetration with the hollow point round. Included a photo of  5.7 rounds with a .223 in the center.
JR

http://img.photobucket.com/albums/v415/JackDRipper/FNFiveSeven.jpg

the jug were filled with water? sorry had to ask , as you did nt state. Any pics of the jugs? measure ment of any rips/holes beyond a .22cal round hole? evidence of tumble?blow water all over the place or just barely?

Yes they were filled with water. Water blew out all over the place and knocked the jugs off the wooden sawhorse they were lined up on.
Editing this post as I looked at the jugs more closely. Rounds appeared to fly straight and entrance hole in 2nd jug is same size as in first jug. First  recovered slug maybe appears to have hit the back of 2nd jug sideways and stopped, not really sure. For the other recovered slug passed straight through both jugs and entered a  third (ocean Spray bottle actually) probably tubling some. For this limited testing I'm not sure if the 5.7 round is over or under pentrating?
JR

Shot a bowling pin yesterday with the 5.7 along with the milk jugs.
5.7 round shot clear through the neck of the pin. Exit hole same size as entrance hole. Another round in the "fattest" part of the pin entered and the bullet lodged in the pin and bulged out the side of the pin some. Guess I need to cut it out of the pin and see what it looks like.
JR

Jack my experience with the wood core/tough plastic coated AMF bowling pins mirrior yours, the 5.7 SS192 will generally not shoot though on a dead center hit to the biggest part of the pin...but it sure will clean pins off a table :)  one hit and it flys backward with good haste.
On water jugs, I have found that the 5.7 will tumble(consistantly) in a 16oz plastic sodabottle filled with water (thats only about 3inches across the inside)

But the 5.7 will shoot through a slight bit more wood than the thickness of a bowling pin in general(second pic)...all depend on what your shooting.Now if the wood is spaced apart like in the third pic, it will tumble and that cuts penetration

Where did you get the gun?  I was just reading it says for law enforcement only.  Ive never heard of a 5-7 untill now.  I need to get one if I can!  

JM, have your gunshop order one from CDNN out of abilene tx(they allways have shotgun news adverts. dealer is 699.00 + 25.00shipping from them .

Does CDNN have any hicaps available for the fn57 or just the 10rdrs?

CDNN just has the 10 rounders, I called them today about the 20's, they said next week.
Course they've been saying next week for about five weeks now. Ha!
JR

Alittle off topic but any 5.7 owners have any suggestions on holsters ???  Looking for concealment and kydex tactical.

Blade Tech makes a good IWB with rubber loops and adjustable from straight draw to FBI forward cant(I use this one) in Kydex that runs 59.95 + shipping...I own them for several different pistols they work so well.The Kydex tactical runs 109.00 the 57 is the last entry on the weapon list(not in the order you would think it was in)
www.blade-tech.com/frontend?command=ProductMatrix&iProductId=4693&iSectionId=4395

Thanks for the info...that was just what I was looking for....

Mark
ARguy

your welcome Mark.....glad to have helped! they also make Kydex mag pouches for the 57 as well

Shot my 57 yesterday again. Last month with water filled milk jugs touching each other the 57 would penetrate into 3 jugs with no tumble.
Yesterday I spaced the jugs about 2 or 3 inches apart. Doing this I was getting tumble when entering the 2nd milk jug, nice bullet profile.  First one pointing to about 1 o'clock and the other 3 o'clock position.  Posted a pictured with recovered bullet
Looks like I shot through my wood saw horse last week  with my 57, buillet went through four 3/4" pine boards.  Second board spaced 7" from first with no tumble. 3rd board spaced 40" from #2 and starting to tumble and 4th spaced another 7" had a tumbled horizontal entrance and exit wound.  
Guess it counts as a (unintented) penetration test.
JR

http://img.photobucket.com/albums/v415/JackDRipper/fn57bullitt1.jpg

I need some opinions here!

#1 is the 5-7 a good carrying weapon for self defense?
#2 is the 5-7 hollowpoint (ss-192) the best carry round?
#3 is over penetration something i should keep in mind using the 5-7 in a self defense situation?

1.I would have to risk a trashing and say YES. I carry a .45 on duty, but the 57 is the one I take when I escort diamond shipments(where if it ever goes bad...it goes really bad, and with no radio to yell for backup and the first sign of trouble is the person(s) trying to kill you and take the shippment) Its light enough it dont constanly want to tug your pants down from wearing it all day long...and it has high hit probability .and decent anti personell qualities.
2. SS192 is your ONLY factory loaded option right now, as the SS190 is deemed AP and that makes it restricted to govt agencies .
3 No, though the civy SS192 will go trhough a L2 soft armor vest....its really not an overpenetrator
in most building material and such......and from what Ive shot so far, Im not sure that it would be all that good at shooting through a car door(we need some of our fellow 57 owners to  test that one)
so no its not like somebody using a .44 magnum in his appartment as a bedside gun.....the 57 would do about the damage you would expect of a 9mm if you missed.(the 57 is my bedside gun)



This is what the SS192 does when it hits something hard like a major bone



this is what the bullets(27) look like through a level 2 vest and two phone books(notice the tips folded over to the side from tumble after the armor panel....going through the books sideways

Thanks for those replies, they will be helpful. I've been carring the 57 as my primary and the Kel-Tec P3AT as a secondary. The 57 fits very comfortable on my side (outside holster). I have shot it 25 yards with a 3 inch group. I should practice more and get the grouping tighter. I have the sights dead on bullseye@ 15 yards. I would like to vest up some huge left over pumpkins laying around. Just toying with some ideas. Thanks again....

glad to have been of some help :)   but watermellons are much better targets than pumpkins, as that are not partially hollow and have more water content..........Useless Mellon trivia time:Eugene Stoner sold the air force their first batch of AR15's because he invited Gen Curtis LeMay to a barbeque out on a farm and had watermellons set up at various ranges.....and he handed the General the then new AR15 to try out on those mellons.....the mellons died for their country that day,  and several million AR's later  the rest is history.