I have a 44# steel spade on a 24000 boat. I use 25 ft. of 5/16 chain
followed by 3/4" three strand
This anchor will hold extremely well and reset itself in a microsecond
..... except in soft mud.
Even after initially setting scope at 10:1 and letting the anchor
'settle-in' , it just plainly wont hold. Ive read several posts from
other who seem to have no problems with soft mud and a spade. Any
suggestions?

PING - Glen Ashmore do you have a drawing or list of the lead /
critical lead angles for this anchor - maybe the dimensional angles are
'off' on this particular one.