Yes, it is corrosive primed, just like all other Soviet era 7.62x39mm. The silencers were designed to be easily cleaned, for several reasons I'm sure. This "type US" subsonic ammunition has a very long, 192gr. projectile with a lead core topped by a cone shaped, hardened steel penetrator. It sorta looks like an SS-109 on steriods when you compare sectioned examples.
Just found this and it possibly confirms my theory about Berdan primed ammo. Even though the box says “non-corrosive” that doesn’t mean the primer powder is not corrosive and adds some fact to something I’ve been telling people for years. It doesn’t mean that it’s as bad as 7N6 but will start rust in less than 24 hours under certain environmental conditions. I had non-corrosive ammo cause rust in the gas tube on a brand new Vepr in less than 1 day and I had quite a few people look at me like an idiot when I warned them about immediately cleaning.
Yes, it is corrosive primed, just like all other Soviet era 7.62x39mm. The silencers were designed to be easily cleaned, for several reasons I'm sure. This "type US" subsonic ammunition has a very long, 192gr. projectile with a lead core topped by a cone shaped, hardened steel penetrator. It sorta looks like an SS-109 on steriods when you compare sectioned examples.
Yes, some of the very early subsonic loads and experimentals were made at Tula, but 99% of the production of this load was made at Klimovsk. Same thing with the T-45 tracer. Most of it was made by Klimovsk after the late 1950s.
OK,.. 192gr bullet,... how much powder?,.. FPS/MPS?
i only ask because i am eventually going to get a AK-104 clone built and i want to put a suppressor on it,...but i have never seen any sub-sonic AK ammo (7.62 or 5/45),. so i would have to make my own, and any info would make life alot easier when the time comes.
I found the Russian ammo data books. The subsonic 7.62x39 ammo has a 12.5 gram bullet. The bullet diameter is larger for "better gas seal". It's 7.94 mm in diameter vs 7.92 mm for standard 7.62x39 ammo. One book says the bullet is armor piercing with a lead "sheath" over the steel core and of course a jacket. This book states a powder charge of 0.75 grams. The other book may have more mistakes. It shows bullet weight at the same 12.50 grams but list a lead core and a powder charge of 0.57 grams (misprint?). The first book has more details and I think it might be correct. It explains the larger bullet diameter and armor piercing steel core.
The velocity is stated as 293 m/s to 310 m/s in an AKM. The bullet diagram drawing shows a small (short) sharp steel core tip with a large lead core behind it. it also states the same diameter as standard 7.62x39 ball ammo at 7.87 mm to 7.92 mm, but this is the second book which I think also misprinted the powder charge. Case length is 38.36 mm to 38.70 mm. The cartridge length is 55.4 mm to 56.0 mm.
The AP steel core tip weighs 1.52 grams to 1.56 grams. The powder type is described as, "tube", which most likely means extruded powder. The length of the bullet is 33.4 mm to 33.6 mm.
Chamber pressure for standard 7.62x39 ammunition is rated at 274.6 MPa. The rated chamber pressure for this heavy bullet subsonic cartridge is 122.6 MPa.
Thats not a PBS1. Might be some modern, post Soviet version.
The Soviet PBS1 does not have the conical baffles. It also uses a large rubber "wipe" as the first thing the bullet passes through. These were dispossible, good for a couple magazines, and were included with the subsonic ammo.
Though the laws on wipes has gotten better, they would probably still be forbidden in the USA as they are a suppressor part.
They did relax it so you can make your own, IIRC.
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