This review of M855 5.56 NATO ammunition by Mrgunsngear details its performance in ballistics gel and chronograph testing. While capable of penetrating Soviet helmets due to its steel penetrator core, it's not true AP ammo. Testing showed fragmentation and yawing issues, with potential for over-penetration without significant damage on thin targets. For home defense, alternatives like soft points or OTM bullets are recommended over M855.
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