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Reloading 37mm Rounds Reloading/Making 37mm Flare, Smoke and Aerial Star Burst RoundsCases are plastic and reloadable by use of a #209 shotgun primer. Use FFG grade black powder, 1 teaspoon per case as a lifter. I've found three types of cases:
Smoke Burst RoundsFor this round, you must create a time fuse which allows the lift charge to project the round out for several seconds before it bursts. This time fuse is created by applying masking tape to a normal green (or red) visco safety fuse in such a manner (see figure 1).
 Figure 1 The masking tape is placed around the fuse to protect the fuse from the epoxy as it dries. The epoxy must not soak into the fuse, as if is does, the load will not ignite and the round will just fall to the ground. The first thing you will have to do is to create the primer composition. This is used for all 37mm rounds, and will be used in all the reloading techniques in this article (see the primer comp section below). You must purchase or create a paper "plug" which separates the lift section of the round from the load section. Several companies listed in our supplier section sell kits which contain the load shell and the paper caps which are used as the plugs. At this point you'll want to punch a 3/32 inch hole through one of your plugs. Insert a 1 and 1/2 inch length of visco fuse to which you have wrapped masking tape around as stated above. The masking tape should run about two thirds of an inch, making sure that when you apply the epoxy in the next step that none of it touches the fuse. The fuse should stick out about one quarter inch from the bottom of the plug. The end of the fuse should be sealed with the prime compostion, and you should make sure to actually seal the fuse to the plug using the prime comp. Wait until the comp is completely dry before proceeding to the next step. Next you must apply a ring of Elmers glue inside the case about one-quarter inch inside the case, and place the fused plug inside. You will now need some two-part epoxy (not hot glue or white glue, but epoxy), the type that frequently comes in two tubes. Go ahead and mix them, and pour enough into the case around the fuse to come to the top of the masking tape (about one-quarter to five-sixteenth of an inch). Make sure that the epoxy does not touch the fuse (it can touch the tape, just not the fuse that has not been protected with the tape). Once the epoxy has hardened completely, fill the rest of the chamber with your smoke mixture (*see the section on smoke mixtures for more info). Now apply a ring of glue around the inside of the top of the chamber and place the end (paper) plug in place. The only step left is to add your lift charge to the breech cavity around the fuse (at the bottom of the round) and glue a piece of paper over the end of the round. The round can now be place in a primed case (a case with a new shotgun primer), and is ready for use!
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