Brass Enclosed Base
One bullet designed for safer use in indoor ranges is constructed as a reverse of the full metal jacket design. If the FMJ bullet is thought of as a cup of gilding metal filled with lead, the brass enclosed base bullet turns the cup in the opposite direction. Rather than having a meplat jacketed with gilding metal and an exposed lead base, these bullets have an exposed flat lead meplat and an enclosed gilding metal base. This is claimed to eliminate vaporization of the toxic lead from the base of the bullet by the hot gases of detonation, just as with a TMJ bullet, yet conventional FMJ manufacturing techniques can be used to produce BEB bullets. BEB bullets are distinguishable from JSP bullets in that the jacket extends all the way to the crown of the tip.
Read more about this topic: Soft-point Bullet
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