Of interest to some.
Brass mold is solid and has been blind spark eroded to get the hexagon and helix angle
So the projectiles cast up with a slight surface grain
Might work like the golf ball dimples
Of interest to some.
Brass mold is solid and has been blind spark eroded to get the hexagon and helix angle
So the projectiles cast up with a slight surface grain
Might work like the golf ball dimples
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