FN 5.7x28mm reloading

[brandons]

Im new here and was just wondering if any of you have reloaded FN 5.7. I was starting to reload them and ran into a problem the fired casing swell the shoulde up shortening the neck and my rcbs dies ar not sizing it back.If you know what my problem is please let me know.I heard hornady dies might solve the problem but i dont know the shoulderraises up the casing 1/8 in

[fightingquaker13]

Brandon, I cannot help you, but you can help me, and thats almost as good, right? I've seen an FN chambered in this round but am totally unfamiliar with it. I suspect its new to lot us here. Could you give us a brief run down on it since you must have a pretty good knowledge of its capabilities, applications etc. if you're reloading it. Thanks
fightingquaker13

[tombogan03884]

Search the Shooting Times web site, a few months ago they had an article on the 5.7 that included Reloading info.
http://www.shootingtimes.com/ammunition/

[brandons]

Brandon, I cannot help you, but you can help me, and thats almost as good, right? I've seen an FN chambered in this round but am totally unfamiliar with it. I suspect its new to lot us here. Could you give us a brief run down on it since you must have a pretty good knowledge of its capabilities, applications etc. if you're reloading it. Thanks
fightingquaker13

Hello fightingquaker the FN 5.7 its a good round to have fun with ive heard both sides it penetrates to much or it penetrates just right. I think the penetration is good ive shot a thickphone book and it was a pinhole in front and a hole almost the size of my fist in the back.But more to your question, it has with the factory loads 40gr v max 1700fps to 1800 fps.Very low recoil less than 9mm.I love the gun fun to shoot but running into problems with the reloading the manuels I have for accurate # 5 and 7 you can get the bullet traveling about 2000fps out of a auto handgun thats acccurate thats fast.But the energy in that little bullet is the problem it lengthens the case and shoulder and shortens neck so your gun will not shut all the way closed so anyone reading this be careful if your reloadng.im using a 22 cal v-max 40gr red tip to reload

[Badgersmilk]

I'm not sure I understand your post.  If your saying the neck of the case shortens 1/8" when fired.  SOMETHING IS WRONG WITH THAT GUN!  or  Your loads are so hot they'll likely blow the gun up very soon.  Most dies only neck size, so they wont change the shoulder dimensions (as you've seen). 

From the little I know about the cartridge, "True Blue" powder is what its all about.  Check out their site, click on "load data".

http://www.ramshot.com/powders/

This one as well.

http://forums.accuratereloading.com/eve

Of what I've seen there's a total of about 4 people using this forum that hand load.  Do a little searching with Google.  LOTS of good groups out there that'll share good info and do their best to help you learn without a dozen armchair cowboys spouting off.

The best load information I've found has been from component manufactures such as Hodges, Lee Precision, and what ever bullet manufacture I happen to be using that time.  Good luck.  Interesting cartridge you've got!  Planning on any hunting with  it?

Addition:  I just checked my "modern reloading" book, nothing in there on your caliber so Lee Precision may not be a good option for you.

These guys seem to have experience with it.
http://www.accuratepowder.com/data/Accurate%20v322%20web%20publication.pdf

My bet would be any factory ammo your using may have their powder in it.

[Sponsor]

[Badgersmilk]

Reading through your two posts more carefully I think I uderstand whats happening.  HOLY CRAP!  You shot more than once after seeing this?!?!  I'm wondering (if your still alive) if its only on your reloads you seeing the case's grow?  could be a problem with case lube.  To much case lube will warp necks on firing and could allow the case to slide in the chamber as its fired (stretching).  Are you wipeing down the brass really good after you load it to be sure all residue is removed (lubes, cleaners, oils).  Are you over oiling the gun?  Oil in the chamber will cause the case to stretch.  Note that every manufacture lists this as a very sensitive cartridge to load!  Try reducing your pressures.  There should be NO oil or lubricants on the chamber walls or cases.

If your gun is doing this with all ammo, and its not from over oiling.  Return it to the manufacture before it kills you!

I've heard about stretching cases this much in extreme situations in books, but WOW!!!  Somebody actually did it a lived!  Cool.  Glad I wasnt there.  Thats cool that you lived to tell about it!!!

[Badgersmilk]

Can you please post a picture of the before fired, and after fired brass next to each other???  What did the primers look like?  Was there swelling of the body of the case next to the head?  Discoloration?

WOW!  I really am glad your alive to tell about that!  WOW!

Craziest I ever got was using modern factory loads in an OLD, OLD gun with the barrel pitted.  It pushed the primer back is all though.  Scared the crap out of me when I saw it.

WOW!  You even have the sack to want to use the brass again after that!  COOL!

In all reality...  When one of those cases lets go a teeny bit more my guess is it probably wouldnt kill you.  For sure it'd make Gainsburgers out of your hands...  The slide could blow off and hit you in the head, maybe more Gainsburgers.  But probably not enough to kill.  WOW.

[tombogan03884]

 The round hasn't been out that long so unless your reloading manual is brand new it probably would not be listed yet.
As to pushed out primers, I've seen UNDER strength loads do that as well.

[ccd]

I am going to guess that your resizing die isn't properly adjusted and that the real problem is being caused there.

http://www.fivesevenforum.com/

This is the place to check out  for the 5.7.

Remember that for a cartridge as small as the 5.7 any mistakes/missteps are going to be magnified. I would be really surprised if annealing once fired cases wasn't a requirement on the 5.7. I'll probably find out this fall as that is when I will order a Contender barrel for the 5.7.

[Badgersmilk]

Tom, True nuff.  I've heard of that as well.  I've only tried the one brand of ammo in this gun as yet (only had it a short time).  Fired one round then cleaned the barrel after each shot three times in a row.  All the primers were pushed back around the firing pin in the little gap between the pin and the hole.  The primer itsself was still in place (didnt push back out of the case).  No unusually large gap between the pin and hole.  But this particular gun has a REALLY long firing pin.  Sticks out of the bolt further than any gun I've ever seen.

It's a 91/30 built late in the war in the Izhevsk arsenal from new parts from both there and the Tula arsenal with a sniper grade barrel (has the 0 marking on it), and a 1928 stock.  EVERY part is from a different time and place, but all numbers are original stampings and match!  They never issued it and the rifling is as sharp as a razor, but the bore is as pitted as a gravel road.  Funny because NOTHING else show's signs of rust.  Just the bore.  Test fired with corrosive primers before storage I guess.

Could be low pressure, but with modern factory ammo (soft primers), and the extra long firing pin I'd bet its stretching the metal of the primer.  Add the rough bore, and you get a scary effect!  The three shots it fired were about three quarter inch at 50 yards (iron sights, so probably mostly my fault).  I may shorten up the firing pin a bit after trying other brands of ammo.  Even the individual parts of the bolt are from different times and arsenals!  All look unused though, and the action is smooth as butter.  Weird.


With that FiveseveN, a 1/8" per firing stretch is WILD!  Are you measuring them after firing, or after sizing?  Are you guys doing any hunting with this caliber???