34 heavy alloys 34 are that class of two phase multi component tungsten alloys containing nickel and at least one other metal and in which one phase is essentially tungsten and the other phase is a solid solution of nickel tungsten and the other metal or metals it has been found that the heavy alloys are suitable for forming the tail component of a penetrator where a cavity is to be machined into the tail component it is preferred to use heavy alloys having a density of at least about 16 7 grams cc therefore these alloys containing at least about 88 tungsten and the balance being nickel and other metals such as copper molybdenum iron titanium and the like a particularly preferred alloy is 97 3w 1 35ni 1 35fe the projectiles of the present invention have multiple components of different materials with particular reference to fig1 a cross section of penetrator 10 is shown comprising a body component 12 and a tail component 14 containing a tracer cavity 16 nose component 18 is of the same material as the body component 12 and can be either fabricated in one section comprising both the body component 12 and nose portion component 18 or if desired the pieces can be fabricated separately and the nose component 18 can be joined to one end of body component 12 the method of joining the components can be brazing inertial welding and the like the tail component 14 is similarly joined to the opposite end of body component 12 frangible materials as previously described are used for the body portion 12 and nose component 18 each of these materials will penetrate the targets up.