Anybody has any experience with D'addirio baritone strings?

I have a set on my baritone and when I first put them on they were
outstanding with great tone...I haven't played this ukulele for some time
and when I tuned up and played it the strings were really loose and
floppy...not sure what happened, but they are in tune...but stretched.
the strings have less than a half hour playing time..I thought they were
higher tension strings like I read here.. anybody knows whats up.
thank-you in advance...