As noted above many different manufacturers choose to rate "advertised duration" at different points.
Generally .006 tappet lift is the most common.
Yet the catalog numbers advertised do not tell the whole story.
Like cylinder heads, with cam lobes I like to look at the pedigree of a lobe design.
Harold Brookshire who designed the Ultradyne and Voodoo lobes was one of the best ever.
Mike Jones is another great.
http://jonescams.com/hydraulic-flat-tappet/
Some lobes may be lazy, others too aggressive.
A great designer is your best crack at just right.