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Scott V2
December 22, 2008, 06:08
If someone were so inclined to have a project to keep them busy instead of watching the tube, could this be done?

7.62x25 is about the same diameter round
7.62x25 OAL is 1.377
.45acp OAL is 1.275

comments?

jdmcomp
December 22, 2008, 08:29
Where did you get your measurements? The 45 case has a diameter of .476 vs the 762x25s .398. Not even close. And magazines would have to be fabricated as well as mag well. Doubt barrel dia is big enough to bore out. Nope, not going to happen easy.

Deltaten
December 22, 2008, 09:08
7.62X25 is about .40 in diameter...just a hair fatter than a 9mm.
Base on a .45 is right around 4.73


I see jdm beat me to it ! ;)

OAL would work tho. Ya can make anything into anything with the right parts and enuff perseverence, I don't recall what the boltface of the Ppsh is like. LOtsa work to convert to Semi anywho, so what's a little more?? :D

Find a bbl similar to a THomson and it's a piece of cake :D

Scott V2
December 22, 2008, 10:31
I posted too early in the morning. It is the .308 that is the same diameter as .45acp. Ooh well!

K.O.A.M.
December 22, 2008, 12:55
Originally posted by Scott V2
I posted too early in the morning. It is the .308 that is the same diameter as .45acp. Ooh well!

So, you're thinking about a PPSH in .308? Nice.:rofl:

justashooter
December 22, 2008, 18:47
plenty of room on the bolt face, but you would loose your own face when that baby comes back.

the 762X25 base is same diameter as 9X19 and 556X45, but increasing the bolt face and floating a firing pin isn't supposed to be too difficult. maybe one of these days i'll get around to finishing mine. the remington 870 fire control group trick has been discussed.

bolt thrust would be another matter. the base area differential would prolly not be offset by the lower chamber pressure. do the math. if you do this use a barrel chunk from one of those cheap barreled actions (mauser 71) that centerfire has dime a dozen the bore and twist is right for 45 ACP, so you just need the right diameter drill to make a rough chamber, and weld the barrel in place. start with a heavy spring and cut off a 1/2 coil at a time till it runs right.

mags/magwell could be greasegun based.

muttman
December 22, 2008, 23:01
Originally posted by Scott V2
If someone were so inclined to have a project to keep them busy instead of watching the tube, could this be done?

7.62x25 is about the same diameter round
7.62x25 OAL is 1.377
.45acp OAL is 1.275

comments?
not that I know that mutch but,,,,,,
yes it can but at what cost?
the 7.62x25 bolt face would be 10mm along with 9x19, 5.45x39 the 5.56x45 would need a .375" bolt face. the .45 would need a .5" bolt face. the only problem I see would be mag's there is not mutch to a pps43. it can be made.
muttman

bykerhd
December 23, 2008, 00:57
You would probably want to set it up for something like M-3 "greasegun" magazines. Or, maybe the Thompson stick magazines.
I think the M-3 magazines are still fairly inexpensive.

It sounds like an interesting project.

jerrymrc
December 23, 2008, 21:13
Originally posted by jdmcomp
Where did you get your measurements? The 45 case has a diameter of .476 vs the 762x25s .398. Not even close. And magazines would have to be fabricated as well as mag well. Doubt barrel dia is big enough to bore out. Nope, not going to happen easy.


Uh, OK................ PPS43 mags with 45ACP/9X23/9X19/7.62X25:beer:

Any questions?

Scott V2
December 24, 2008, 05:15
Originally posted by jerrymrc



Uh, OK................ PPS43 mags with 45ACP/9X23/9X19/7.62X25:beer:

Any questions?

I think you just cost me some $$$$:biggrin:

kalliste
December 24, 2008, 05:43
Originally posted by jerrymrc
Uh, OK................ PPS43 mags with 45ACP/9X23/9X19/7.62X25:beer:

Any questions? Looks like you might have to glue a strip of something in the front of the mags to keep those shorter cartridges back against the rear wall of the mag. Shouldn't be a big deal tho. Tweaking the feed lips might be slightly more interesting. Getting the magazine right is going to be the big issue for reliability. Have you noticed how ridiculously over-engineered the British Sterling SMG mag is? The Sterling is just the Sten gun re-visited and made different enough for people to forget the crappy Sten magazines.

justashooter
December 24, 2008, 12:41
concur on the feed lip geometry issue. not so sure you will have to pad the mag for the difference in length wiht the 45, though.