nsaqam,

I like to run about 2,500 to 3,000 psi below SAAMI MAP, in general. I also don't use QL load data as gospel but as an additional source of reloading data. I've had some very accurate predictions come out of QL and some less so. But it's nice for a particular combination where actual tested data is a bit shallow. It can also help determine a theoretical "optimum powder" as Ken has pointed out (one of my favorite features as well).

Have fun with it.

“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear