RSA & Israeli TZ80: length/headspace problems?

[Grinder]

I was case micing some SA ammo for a friend today. It doesn't chamber well in his FAL. It is oversized at 1.633. So I decided to check some other surplus 7.62X51 ammo as a curiousity thing.
Spanish 1.631
RG 1.630
Port. 1.630
Czech 1.631
SA 1.633
TZ80 1.624-28 !!!

Take a 1.6355 NATO chamber - 1.624 = .0115 !
Can you say potential case head separation.
I shot some in my M1A a while ago. Either I got lucky or it is actually very good brass. This stuff will stay in my tighter chambered rifles. In fact, I may take the time to weed out the really undersized ones. Just a heads up on the TZ and the SA (if you have a tight chamber).

[ August 10, 2001: Message edited by: EMDII ]

[Ape]

That SA would be just a bit snug in my Fal as well.

The TZ is a little scary. From what I have read, the nato ammo is usually with in spec far more often than the commercial.

My latest batch of RG also mics at 1.630

Great Info Grinder

[EMDII]

Our FAL rifle kits have probably been headspaced w/ a civilain .308 gauge.

7.62x51 headspace is a bit more generous, allowing for fouling and adverse conditions.

[ August 10, 2001: Message edited by: EMDII ]