4" may be a little exaggerating, but a trusted 5.7 member years ago zero'd his gun with SS197SR (has an MRDS on it) and SS195 would shoot 2" higher at 35 feet, and AE TMJ was about an 1" lower..

That's some hellacious bbl harmonics, b/c the math doesn't work any better for 2" @ 35 feet than it does for 4" @ 30 feet.

I'll have to see if he has the picture of the various rounds he tested besides 195 and 197

here is that user. 50' with 195 was zero:

That's some interesting bbl harmonics.  Be interesting to put one in a Ransom Rest.

And this morning I managed just that - traded it for a Mk2 Five Seven with 6 mags. Now to find ammo and a holster.

I was sure the talk about the zero recoil was an exaggeration. It was not. This was 10yds rapid fire, not even trying for precision accuracy, just blasting away as the sun was going down. It's a fantastic pistol.

For what it is worth, I'll throw in my two cents.

My FFL lent me a couple FNs couple weeks ago, one of them the Five-seveN.  If someone wants to carry it, I get it.  If not, I don't.

First off, I appreciate everything on this thread that has been said.  I find the ballistics of the 5.7 round, the history of the firearm and the mechanics very interesting.  I won't even pretend to comment in the level of detail some of you are.  Maybe this can serve as the common person's perspective.  

Here are the comments I provided to my FFL who has been trying to sell me one for some time:

"We went to Cabelas for ammo for this before hitting the range.  There was an army guy from down south in the ammo row who had a 5 7 and was talking about a foot of flames when he fired his and how it was novel, but sat in his safe a lot.  We picked up some American Eagle ammo. No foot of flames.  Maybe it is different than the FN ammo...  It shot really nicely.  Good groups, no muzzle flip, back on target fast, very easy to control.  Interesting controls and break down.  Controls weren't' right where I would have liked and the slide release was harder to work with than need be.  Understanding what it was made for, it was very intriguing.  It wasn't one to fall in love with for me though. Considering the size, 20 rounds is kind of unimpressive too.  

Right or wrong, looks (plastic all over) and round type of the 5 7 remind me of the PMR.  Except the PMR is waaaay more fun.  The boom and fire of the magnum, 30 rounds, ridiculously light weight.  You just laugh manically when you shoot the PMR. Maybe if I had MilSpec ammo for the 5 7 I would laugh maniacally for that too..."

I have other firearms I prefer to carry, so I know the Five-seveN would not make it out often.  The cost of the firearm and the ammo compared to the PMR means that's a lot of money to sit in my safe for something I am only intrigued with and not in love with.

It may feel like a PMR, but the 5.7x28 and .22 Magnum aren't ballistically similar.  5.7x28 will always be faster at the same bullet weight and barrel length than the .22 Magnum by a good margin.  Plus, one is center fire and one isn't, and surely we've all had rimfire rounds fail to go bang at some point or another.

Understand and agree.  Just saying it would duplicate the spot in our collection held by the PMR and for what we would use it for, prefer the PMR.  For carry, completely understand why one might choose the Five-seveN over a PMR.

What is holding my attention is that you're getting over the 2100 fps flesh elasticity limit out of a pistol.  But I'm curious about the .22" TCM as well, which is in a far more traditional platform w/ a well-known manual of arms, and the flexibility to flip to 9x19mm out of the box.  It would also seem possible to run shorter bbls and have a more concealable pistol in .22" TCM, albeit you'll progressively give up velocity as you shorten the bbl.  There is a rifle that takes the RIA .22" TCM double stack mags, albeit's a bolt action.

Now that there's a rifle that uses the FN 5.7 mags, the 5.7 becomes a more attractive pistol.

I own both the PMR and FSN. Granted I paid double for the FSN than the PMR (I waited until they became $499, not $600+), ammunition costs have come down on the 5.7. Ammunition costs on the 22 mag have went up immensely. I shoot 9mm for $5 less per box than 22 mag. I'm not able to find $8-10/box 22 mag anymore.  

Trigger is shorter pull on the PMR 30, but doesn't break as nice as my FSN. The PMR factory sights are "mehh". I have a BFIII on it, and it's slightly better. Sure I can load 30 rounds in a PMR mag, but there's a good chance it's not going to feed/work 100%. The only time the FSN has given me troubles is shooting suppressed. 

The CMR-30 intrigues me, but I couldn't get my hands on one, and wasn't going to pay $1200 for one. Maybe if I can get one for MSRP, I might pick it up because I like the design, and it's screaming "SBR"!! However at the cost of 22 mag, my PS90 SBR I just finished is a lot nicer :D

The 22TCM is also nice because with the 9R variant it will work in a Glock, however the 22TCM is pretty much filled to case capacity, and requires short bullets to allow that. Longer bullets like SS192/195/198 wouldn't work in the 22TCM because you're going to lose a lot of case capacity because of bullet length. The RIA 22TCM I shot, was finicky on the last couple of rounds. The 1911 "heft" did make shooting it quite fun though :)

Different strokes for different folks

The CMR-30 is very interesting b/c w/ a 16" bbl and the right ammo (CCI 30 grn) one may be hitting 2300 fps:

http://www.ballisticsbytheinch.com/22mag.html

But @ $1200, that's pushing things.  .22" WMR is quite popular amongst the DAO J-Frame crowd.

Wish they'd do the PMR & CMR in .17" HMR.

What velocities have you seen in .22" TCM?  Would be interesting if you could get one of the double-stacks into an AR magblock.

^ I averaged 2015 fps from a 5" barrel and the Armscor 40gr loading. Longer barrel is definitely going to help since it's got plenty of powder to burn (9.xgr)

If ammo wasn't expensive I'd have one. I'll still get one but there's a couple other 12-1500 pistols I want first I think. They are unique that's for sure. Have a friend that carries one.

Be interesting to see what .17"WSM would do out of a pistol bbl.

Pics from Gunblast showing the 22 TCM hollow point and 9mm fmj vs 3/16" steel.

Saw a bunch of the little KelTec .22" WMR rifles today @ the gun show.  $800+ish.  Couldn't figure out how to retract the stock, however.

I have a FN five-seven and a RIA double stack 9mm\22tcm. I really should get out there and try to compare the two but I haven't yet.

My biggest problem I've had with my FN was with the ammo. I remember taking some ss198, ss197, and AE out and I didn't even have enough adjustment in my sights to compensate for the weak ass AE ammo.

That same load failed to penetrate a premium level IIIA panel though. It will still put a hurting on you, but the 5.7 definitely has the advantage of the wide array of bullet designs that will work in it.

I dont doubt that but its pretty impressive for being a lead tipped hollow point coming out of a handgun, I think.  I haven't kept up with the 5.7 lately but is there any info of it using HP ammo penetrating better?  A quick search popped this article up on TFB, and this on the fiveseven forum with FMJ.  I dont have a horse in the race just curious about the two calibers.

Definitely agree there. The TFB article is a farse. Alex never had SS190, based on all the pictures he had of the recovered stuff, yet he never printed a retraction/correction to it. I went out and proved SS190 was easily capable of going through 3, level  IIIA panels