After I loaded them I got to looking at my Speer manual and although it doesn't list a load for a 185 LSWC, it does for a 200 LSWC at a max of 5.0grs but says these are loads for target shooting and not necessarily at maximum pressure.
And......there is another warning about the SPEER manual is only for SPEER bullets.
BTW.........SPEER lead bullets are swaged and softer than cast.
Anyway.........normally (when you're using data, with no matching BOOK data)..........you'd look at several data sources. Taking into consideration the "max" and/or the "starting" data. Make your decision based on the compilation of the knowledge.
Remember to start low and work your way up.
Testing is the "price of entry."
Aloha, Mark