Rare Chinese imported 690 grain semi-AP, steel core is harder than .50 cal ball steel core but not as hard as armor piercing. British Royal Ordnance factory headstamp ST-92. Non-corrosive. Only one lot of this ammunition came into the country before the Chinese ammunition import ban. This ammunition originally came in sealed tins. We have a range report – it shoots clean and is similar in velocity and accuracy to Israeli ball ammunition.