Jan 7 2014
I make my spolette’s with the same tubes I make for my 10mm Flash insert’s.
I add small increments of 4FA/7FA Black powder and ram, I keep increments and ramming the same each time, this way I get a consistent grain throughout.
The burn rate is 1 second per cm. This is perfect for shell timing.
This spolette has a 5cm thick core, so should be 5 seconds.