Charge feeding arrangement for an explosive charge driven setting gun

Explosive charge driven setting gun for driving fastening elements, such as bolts, nails and the like, into a hard receiving material, such as concrete, steel and the like, comprising a gun housing, an axially elongated barrel mounted within said housing and having a front end and a rear end, a charge holding member located within said housing and positioned adjacent the rear end of said barrel, said holding member having at least one recess therein for holding a caseless charge, a firing chamber within said housing adjacent both said holding member and the rear end of said barrel, a feed member located within said gun housing for displacing individual ones of the caseless charges from said holding member into the firing chamber wherein the improvement comprises a plunger located within said gun housing on the opposite side of said firing chamber from said feed member and said plunger having a cross sectional shape transverse to the axial direction of said barrel which corresponds substantially to the cross sectional shape of said firing chamber extending transversely of the axial direction of said barrel and said plunger being displaceable through said firing chamber and said feed member and said plunger being arranged coaxially of one another.