S&B 7.62x39 ...Too hot?!

G37

G37

CGN Ultra frequent flyer
Rating - 100%
212   0   0
Location
Vancouver
So,

I bought a cz-858 and three crates of surplus ammo!!

The rifle is superb. Super accurate out of the box.
My only concern is the spent cases have flattened primers and the headstamps are flattenend to the point of almost hiding the stampings. Is this normal?

I put a no-go guage in the chamber and it is really far off from closing --- is my chamber too tight? or is the ammo too hot? ...or is this normal?

~Cheers
 
Last edited:
G37 said:
My only concern is the spent cases have flattened primers and the headstamps are flattenend to the point of almost hiding the stampings. Is this normal?
Click to expand...

Hell no! :eek:

An example of normal use...fired on the left and following unfired round ejected on the right.

100_25572sm.jpg



Methinks you need to get your rifle to a gunsmith that knows SKS.
 
Get some commercial ammo and try shooting two or three rounds, feeding them one at a time into the mag. Then compare the newly shot brass with the shells from the suspect S&B ammo.
Do you have access to a chronograph? comparing speeds could give you a clue, too.
PP.
 
I cleaned the headstamps this morning with windex and they didn't look as bad as last night... last night they had burnt lacquer filling the stamps so I thought they were deforming; after the cleaning I could see them again:
762.jpg


They look similar to Calums pic... what do you think?
The primers definitely look like they are getting squished more than normal though in both our pics (which makes me think it is normal and they have some extra "ooomph" in them ;)). - They are probably maxed-out factory loads (or am I just too used to shooting pistol?)
 
Last edited:
i just check my casings from sks and cz858 , the sks are like calums pic , flat at the bottom , the cz858 are round at the bottom therefore deeper , altho yours is a wee bit more than mine .

i wouldnt worry about it but if you are still concern then switch the firing pin .
 
This is why when reloading one will need to use the cci arsenal primers...or buy a firing pin and spring kit.
 
Last edited:
The good news is that it's the exact ammo the gun was designed to shoot. You also need to remember that there's no reloading these cases so it isn't a huge deal if thy're out of spec when they've been fired as long as they're ejected in one piece.
 
Yeah, Im not too worried (now that I know it's the ammo)... I was just surprised I was seeing primers look like that from factory ammo. When I reload HOT pistol loads I usually load them so that they come out the same (primers start showing visible signs of flattening.)

I guess it's military stuff, steel core no less. Those Checkloslavakians don't mess around :)

:)
 
Last edited:
Looks perfectly normal. I wouldn't worry too much.

On a related aside; there is a lot of variability in the "heat" of surplus S&B, I've had "cool" rounds dive into the dirt after a string target hits and I've had some pop-off hot enough to crack the cases in the shoulder area.
 
You must log in or register to reply here.
Back
Top Bottom