[quote=@ClocktowerEchos]
[@Willy Vereb]
With current refining abilities its 1.5-2.0 depending on the shell/use.

Greandes and mines tend to be on the smaller side towards 1.5
Smaller bombs and most artillery shells at roughly 1.75
Large shells for big guns and ship cannons and big bombs are at 2.0
[/quote]I see. Well, that's only slightlty better than RDX in general which has the RE factor of 
1.5 IIRC.
What is the reason brhind the varying rates?
Refining rate? Mixing it with cheaper explosives?