There's still a lot of 7.62x39. It is still inexpensive, just not cheap. The domestic stuff is about 0.50 per round for JSP(Remington, etc), the Russian stuff is still $150 for 1000 rounds of FMJ or JHP. That's still not bad.

Good for deer or SHTF <img src="/images/graemlins/crazy.gif" alt="" />
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ZOMBIES! I hate ZOMBIES.