BenglesBullets 37mm Point Detonating Round

This is a 37mm 3D-printed point detonating projectile featuring a bore-riding safety design. It is compatible with 37mm 4.5-inch cases offered on this site. It is also compatible with the 4.5″ 40mm tube and I recommend using a MILC chamber (40mm or 37mm) with this round. Start with a load of 5.5 grains of bullseye to archive about 200 fps and a range of about 200 yards.

Upon firing, the bore-riding safety disengages, allowing the internal firing pin to function on impact. The projectile is designed to accept a 209 shotgun primer (not included), which is used to initiate a payload contained within the nose section upon impact. All required hardware is included except for the primer.

The projectile is modular and threads apart into three primary sections. If recovered in serviceable condition, select internal components may be reused. The design emphasizes compatibility, and ease of assembly.

Recommended payload types include inert or signaling materials commonly used in training or demonstration applications. Payload configuration and use are the responsibility of the end user and must comply with all applicable laws and safe-handling practices.

Included components:

• Safety pin
• Safety pin spring
• Primer retaining washer
• Brass firing pin
• Firing pin keeper spring
• Projectile nose cone
• Projectile payload capsule
• Projectile primer housing
• Projectile pusher

Important notice:
This projectile contains moving internal components and is capable of primer initiation under certain conditions. Care must be taken during handling, transport, and use. Improper handling may result in premature activation. Users assume all responsibility for safe assembly, loading, and operation.

To assemble the round, first insert the firing pin into the pusher. It should fit freely and slide inside the bore with no resistance. You can now install the safety pin spring followed with the safety pin into the side of the pusher. The firing pin should now be locked into position. You must hold the safety pin in place until you insert it into a case which will secure it. Next, set aside the pusher and install a 209 primer into the middle section of the projectile. Only use enough pressure to slowly seat the primer. Place the washer over the primer and then install the firing pin keeper spring over top of the firing pin in the pusher and thread the two sections together. You can now decide to use the payload capsule by adding FFFg Pyrodex into it and screwing it in place. Fill the nose cone with chalk then apply some RTV or other sealant to the threads on the nose cone and screw it on. This assembly should resist initiation in the case of the round being dropped but care must be taken. Premature primer initiation is possible when using this round. The RTV is to prevent the high pressure propellant gases from leaking in through the threads.

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