Nick, not sure about this, but does the 25mm '30 use the older type piston seal and not the newer type as per fitted to the 26mm guns?

So, I'guessing that, unless you have gone and sized the seal, there may well be at least another half a FT.lb lurking there, just on current set-up??

So, if you're liking the way this little sweetheart is shooting, I'd definitely be letting it fully settle down?