In addition to the actual duration at 0.050", this is what Dwayne Porter measured on one a few years ago.

MP .590 cam, actual measurements-
DUR. @
.020=303.5
.050=270.5
.100=235.0
.150=205.0
.200=177.0
.250=148.5
.300=117.0
.350=76.0
lobe lift@TDC @105 ICL=.140
LSA 106