Accurate load guide 3.5 http://thefiringline.com/forums/atta...8&d=1326576578
2230 62 MIL M855 21.4 2,785 23.8 3,050 54,137 2.260
2230 62 MIL FMJ 21.2 2,791 23.6 3,072 55,000 2.223
The first one i sthe green tip/SS-109/Penetrator. The second is lead inside copper, but the same weight.
Note: They give different loads for different guns (pressure specs, bolt action, military chambers, etc.). This is ONE of the loads/gun types.
The SS109 / M855 steel penetrator bullets will bore through steel reinforced concrete (@~3 rounds per inch), and possibly, ricochet. They can also cause sparks, and are prohibited at some National Forest ranges.