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Bronc’s Bolt Pin Mod:
It's just a simple tape mod for your bolt pin.. After experimenting he was able to reduce about 1/3 of the overall volume in the dump chamber without any effect on his HPR pressure or velocity.
It changed the sound signature a bit to; people told him it started to sound like a Marq. Weird
The right way to do it would be to start at the rear of the dump chamber and wrap tape about 2/3 of the way up towards the o-ring. Then put another roll next to it and go up about 1/3 of the way up. That's it.
Of course tape isn't exact science, but his new kit will have a different size dump chamber and be more efficient out of the box.
Basically, the dump chamber holds A LOT more air then it really needs to shoot the gun, so I started working on reducing the volume. The results were amazing!
Normal: 2000psi from a 45ci/4500psi tank gets 3 pods
Mod: 1200psi from a 45ci/4500psi tank gets 3 pods.
Just electrical tape, but it's a smaller size then the normal black stuff. See, start at the back of the dump chamber. Go 2/3 of the way up, and then make another roll about 1/4 the way up. Lube and go back and shoot.
The key to test this:
Shoot your gun normally over a chrono at 285fps. Add the tape. Shoot it over the chrono again. If the velocity stays the same, you're good to go. If it drops, you put on a little too much tape. You can obviously experiment with adding more or less and raising or lower the pressure to your liking.
and also it is more quiet
