250 5.56x45mm Cases

Description

250 new unprimed NAS³ 5.56x45mm cartridge cases. Shell Shock’s NAS³ cases:

• Up to 50% lighter than brass cases
• Offer greater lubricity and will not abrade, clog, foul, wear-out or damage breach and ejector mechanisms.
• Offer greater corrosion resistance, tensile strength, and elasticity than brass.
• More consistent round-to-round performance
• Will not split, chip, crack or grow (stretch)
• Eject cool to-the-touch and can be picked up with a magnet
• Suitable for small rifle primers

The bullet will only require a light crimp (we’d recommend a slight crimp using a Lee Collet Factory Crimp Die) – the nickel alloy used in our case cylinder has a much higher tensile strength than brass and does not require the bullet be seated as deeply or crimped as hard as brass.  If you find the bullet spins or appears lose after crimping it is a strong indication that the bullet is seated too deep in the case.