Benglesbullets Point Detonating Projectile

Updated Design 08/09/2025

This is a 3d printed point detonating round that features a bore riding safety. This round is compatible with 40mm m212 style cases but it has a flat bottom making it incompatible with the bb40sv001 (side venting case). The standard bb4038 case is recommended or a standard nylon case with the same blank as a “chalk” round. This projectile is now compatible with MSS nose cones which includes the nose cones for the “Loose Change” and other publicly available rounds. This rounds now has provision for a payload cup which is included. The primer housing of this round is designed to slightly “kiss” the lands in the barrel and you may feel slight resistance when chambering a round. This design is to remove or reduce buffeting in the barrel to stabilize the round.

When the round is fired the safety pin will exit the projectile which frees the firing pin to set off a 209 primer upon impact. The 209 primer is not included but all other hardware is. The 209 primer can ignite a payload in the nose cone of this round. Smoke mix or chalk without the payload capsule or alternatively FFFg black powder in the payload capsule are the recommended payloads for this projectile. This projectile threads apart into three separate sections. The middle or primer housing and pusher section could be re-used if recovered in good condition as well as the firing pin, firing pin spring and primer retaining washer.

Included:

• 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

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.

This is an example of the round hitting at 50 yards. This particular one is the latest BB40PPD002 which is a newer version that has a payload capsule like the loose change round but the effect is similar. payload capsule is loaded with FFFg Pyrodex and the nose cone filled with chalk. These rounds will achieve about 350fps with a full power chalk round blank.

https://odysee.com/@BenglesBullets:0/BB40PPD002:5