7.62x54R 7N13 AP cutaway


#1

7.62x54R 7N13 armor piercing cutaway. Head stamp 17/97. Core made from U12A type steel with heat treatment, pointed.
wolfganggross

Was hoping for a little help on the newer X54R armor piercing ammunition nomenclature. I have:
1953-78, 57-n-323s LPS
1995ish, 7N13 (PP)
, 7N23(?)
2002, 7N26 (BP)
2010ish, 7H37
Thanks for any help or links!
Kevin


#2

7N23 is a 7.62x39

Are you sure you are having a 7N37?


#3

Thanks again EOD.

Just a list that I have, not cartridges. Problems comes from the myths and rumors running rampant across the web. Was hoping for an official listing.

7N37 that rare in Germany , too?


#4

The 7N37 is rare in Russia!
So I’d say it is even rarer elsewhere.

Also I have never seen a 7N26 outside Russia by now.


#5

When the LPS (index 57-N-323S) was introduced in 1953, it was not as an AP round. The iron core was not hardened. [I had a core hardness-measured several years ago.] I understand it was simply a means to save lead, replacing the ordinary L bullet, just like the German SmE replaced the sS. Eventually, it got the ST-M2 bullet in 1988 with penetration in mind.

From what I gathered, indroduction of real AP rounds like the old B-32 was:
7N1, bullet SN, around 1967
7N13, bullet PP, around 1993
7N14, bullet SNB, around 1999
7N26, bullet BP, also around 1999


#6

Jochem, the 7N1 core is not hardened.
The LPS has a hardened core since 1986 and from there evolved into the ST-M to then become the ST-M2. But all still considered LPS.


#7

The hardened core and the ST-M2 bullet were introduced in 1989, in any case, so written in R.Chumak’s book, I think he relied on some documents.


#8

Just for the record: my LPS/7N1 comment was based on Bolotin, p. 93-94 in combination with 119.


#9

Jochem, no idea why he wrote it but the core is not hardened. The core is made of “steel 10” (rolled steel) and has a hardness of 143-187 HB (as per Russian normatives).
Chumak btw. is known to have errors in his work. So no big surprise.
Also as some may remember the 7N1 is on sale in the west and even commercially inside Russia. I guess noone would allow them out when hardened cores would be inside.

AZOV, the LPS with hardened core back then was not the ST-M series but just the regular LPS core hardened.


#10

Of course not, only on boxes with cartridges
equipped with bullets with a hardened core (ST-M2) written LPS))), but I probably here in the place worse seen, with the distance probably better seen)))


#11

Hard to tell as I never saw a confirmed “simple” LPS from 1986 with hardened core.
But publications did suggest them to exist.


#12

For sniper bullets:
Didn’t the 7N1(SN) become the 7N14 (SNB) in 1999 when they started to hardened the core (and made it pointed)?
Is there a 7N33 sniper bullet with a 254gr bullet? That would be 40% more weight than the 7N14 (152gr).

Has the API 57-BZ-323 (B32 API) been modernized since 1954? Any idea on core hardness?


#13

7Н1 and 7Н14 are produced in parallel (as far as I know), for 7Н33 here is the link:
http://sniper-weapon.ru/boepripasy/279-snajperskij-patron-7n33-9-3kh64-mm (первая попавшаяся,извиняюсь за ее качество)))

For today I did not meet information about the further modernization of the cartridge with the Б-32 bullet after 1954.

But the cartridge with the T-46 bullet was upgraded in 1998-1999.