View Full Version : conversion of 7.62x25 to 9mm
01-18-2007, 12:43 PM
specifically on a yugo M56 and PPs-43. Yes, I know about the Kp-44, but like the looks of the PPS better. What would be involved in this? It appears to me that all I would need would be a new barrel and some had fitting/tuning of the feed ramps. Does anyone have any input? I am moderately skilled as a gunsmith, though mostly on 1911's and more recently Hi-powers and HK P7's. I have a decent shop with lathe, mill, surface grinder, welders, etc.
Also, where would be the best place to find pre-chambered or short chambered 9mm bbl. blanks?
02-13-2007, 11:53 AM
Your are correct on PPS-43. The curved PPS-43 mag will hold 9x19 fmjs. You can get UZI barrels from Ohio Ordnance for $15.00
02-13-2007, 12:07 PM
hmm maybe I'll build my second pps 43 in 9mm, I could make the trunnion myself.
02-13-2007, 10:24 PM
I've loaded up a PPS-43 mag with 9mms, you'll probably want to put a metal insert either in the front or back of the inside of the mag, and mod the feed lips. I noticed the beginnings of nose diving, and binding when I finger stripped the rounds.
Another route would be to convert Sterling or MP5 mags to lock into the mag well, but that might be a tad expensive.
02-13-2007, 10:39 PM
I see what you're saying about the nose diving, I don't see any reason why you couldn't use straight mags in the pps43 mag well like sten or uzi mags(whatever fits), that would be a lot cheaper. I think the pps mags will work with a good feed lip going to the barrel.
02-14-2007, 12:08 PM
sten mags are cheap enough, but not really the same hook up point..although im sure you could change it..
how about this: tell me what you think: take the 9mm conversion set up that uses the mp 40 mags and try it with your $15 barrel? they made this for the ppsh41, but the 43 clips look to be the same at the attachment point. maybe this would slide right up in there for you? check that out and see.
the only drawback here is that the mp 40 mags are not cheap, but if the adapter slid in, it would be worth it.
02-14-2007, 12:40 PM
I think itd be fairly easy to weld a tab onto a sten mag...just depends if the dimensions of the mag fit into the magwell
02-14-2007, 09:30 PM
figured that would be the way you might go... did you go check out that magwell insert?
it would appear to be a perfect fit..
02-14-2007, 09:42 PM
looks cool but at around 50 bucks a mag for mp40 mags, it doesn't seem very cost effective. I think I'm just going to see if I can use the pps mags and modify the feed ramp to fix the nose dives
02-15-2007, 08:57 AM
yep thats the drawback there, those mags are high....
that $15 dollar barrel sounds good though.
02-15-2007, 10:32 AM
yea, I got one of the $15 uzi barrels, they definitely aren't new but are in relatively good condition, certainly good enough to make a fun plinker out of.
02-15-2007, 03:36 PM
A sten mag might be too long front to back to fit in the mag well right. Only reaso I say this, is that people have cut the re-enforcement rib out of them so that they could use 7.62x25 in a Sten mag. You'd also have to worry about thinning the feed lug so that it would fit through the single feed of the Sten, or re-form the feed lips so that it is double feed like the PPS-43 mags.
Suomi sticks might work, and they're about the same price.
02-15-2007, 03:59 PM
well I am pretty sure an UZI mag won't work, the only one I had on hand was one I built from some sheet metal but the dimensions are at least close, and it didn't fit at all.
Instead of 9x19 look at 9x23, brass is readily avail. and they fill the factory 7.62x25 mags perfectly. If you can reload, this may be just the thing for you. Ballistics are good and they are known to feed in full auto guns with just a bbl change.
02-15-2007, 06:47 PM
brass may be available but ammo isn't that available. I do reload, I'll consider it, where do you find a 9mm largo barrel?
Its NOT largo. Its winchester 9x23 I believe, they will physically interchange but shooting 9x23 in a largo barrel or weapon is dangerous. Let me check my notes and I'll get you the info.
9x23 winchester data: case length .900", max overall 1.300", 115 grain at 1517 fps out of a 5" bbl delivering 587 ftlbs
9mm largo (Bergmann Bayard) data: case length .905", max overall 1.300", 124 grain at 1190 fps for 390 ftlbs.
Although I can't lay my hands on the pressures, I do recall it was 2x more for the 9x23
the 7.62x25 shows a case length of .988" and an overall length of 1.377"
There are several people who can rechamber a 9x19 bbl to the 9x23 winchester.
You can reload with your 9mm dies both 9x23 and 9x19 but just change the depth of the seat etc.
02-16-2007, 07:03 AM
uh i think i'll just stick with my 7.62x25..... its way cheap and very easy to get, and plenty hot enough for anything happening.
02-18-2007, 11:26 PM
That may be so, but 9mm is cheaper, and way easier to get a hold of.
02-19-2007, 10:27 AM
can you get 9mm for less than .10 a round? cause if you can, im all interested!! care to share?
no i dont reload, im too shaky!!!
02-20-2007, 07:47 AM
Okay, maybe I spoke to soon on the cheaper part, but 9mm is still more easily gotten a hold of.
02-20-2007, 05:39 PM
DAMN!! i thought maybe you had a good connection. i'll keep hoping. thanks anyway. :-)
12-02-2009, 02:52 AM
amen brother. ive been trying to sell the 9 largo ideal for a long time . as far as 9x19 vs. 9x23 more power if u use the 9x23 winchester round. i dont really have a ideal of the difference of a 9x19 luger to a 9x23 largo or winchester but WOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!
12-13-2009, 01:53 PM
The only bad part of using 7.62x25 is that most of it is corrosive and in the year's to come it might be hard to get, and I know it's not a very long round. Where the 9x23 is. Sarco has
a bunch of it.
02-15-2011, 03:37 AM
starline makes new brass.
02-16-2011, 10:32 AM
the 9 largo would be the round u want the winchester 9x23 is just to hot!!!!!