I soon noticed that it was allmost impossible to get a knot hold on these. There is practically no friction when rubbing dyneema on dyneema.
So it was quite logical to see how this does as bearing surface.
I assembled a quick ming-style doublebow from an unfinished project.
It shoots about as quickly as any compound. Pulling only 15kg/26cm stroke ( <20J ) puts a blunt 4mm wide 2gram stick about 1cm into dry conifer board - about as good as a reasobnably powerful target air rifle. So efficiency seems good.
Here is the "pulley"
After a few shots and lots of work out draws does not yet show any sign of wear.