CHAPTER XXVII.
ON BULLET MOULDS.
Joints for Bullet Moulds.—Simple as it may seem, the joint of bullet moulds, unless produced by the manufacturer, who has ample tools at his command, is not often well done. The want of the proper knowledge how “to lay out” such a joint may be the excuse for ill-fitting work. Yet it is easy enough, only “know how.”
Figure 63.
By reference to the cut, [Fig. 63], the joint and one side of the body of a bullet mould, it will be observed that the line A is the surface where the two halves abut or come together. The line B is drawn at right angles to this and in the diametrical centre of the round projection that is to form the joint. At the point of intersection of these two lines, or in other words where these two lines cross each other, make an indent with a sharp-pointed prick-punch, and there drill a hole of the size that the rivet is to be made.
Figure 64.
[Fig. 64] shows the finished joint ready to receive its mate and be rivetted together. After the hole for the rivet is made, a tool must be used to “sweep” or cut down the surface at C, and also leave a sharp and smooth shoulder as shown at D.