Hello Ripp,

thank you for this interesting report!

But I have a question here:
Author says the barrel was 21" and he used healthy amounts of slow burnng powders.
Is this not a contradiction: very short barrel and slow burning powder?

I would expect a big muzzle flash and a relatively "low" output in velocity/energy as slow burning powders normally need a long barrel in conventional cartridge designs.
(Of course I understand that it is necessary to fill the .505 case for about 90% or even more.)

Can you or someone of the NE experts enlighten me here?

Thank you!

best regards
Rolf