Try to get hold of a copy of
(DRAG DEVICE DATABASE )
This is a collection of drogue
& parachute anchor
make very informative reading.
I am an ex sky diver who learnt on round chutes.
(C9-T10) & have great faith in their reliability
After all I trusted my life many times to this
I have not used one in anger, I would
however be more than happy to trust my &
Crews life to them any time nessecary !
Most if not all stories regarding their failure,
Would on investigation reveal incorrect
Sizing chafe or lack of knowledge in their
Setup to be the cause of of said failure.
Get hold of the database and read it