Fully understanding that energy is the square of velocity times mass, this is the lightest bullet I offer for use in the AR-15 and is capable of the highest velocity. This bullet is hand made from pure copper strip into a custom jacket and a hybrid core consisting of 99.9% lead and 0.1% polymer to achieve a weight reduction of 12.5% from its 200 grain brother yet keeping the 200's length. Built to stand up to the rigors of auto-loading with sturdy construction yet yield impressive expansion at typical .375 SOCOM velocities. I hope to post pictures soon!