One golf ball over about 100gr of FFFg.
Gloves - to prevent powder burns as well a padding.
My friend lit the fuse, another readied the camera.
BLAM! Good report, and actually a brisk but mild recoil.
BUT - SMOKE SMOKE SMOKE .
Couldn't see a thing for the sparks and the smoke!
THEY said it went well past the 100 yard end of the range - into the woods.
Then we tried TWO golf balls (both TopFlight's if it matters).
One went significantly further than the other - again 150-200 yards out there.
Great fun, ahhh the smell of black powder and sulpher!!!
Next will be to adapt the iron to a 6' long pole.
Pictures when they're processed and scanned. Likely to be a lot of blurring - it's tough to gently squeeze the shutter release in the presence of the muzzle blast!