I use an OAL gauge to find my lands. I back off .003 from the lands and start at the minimum powder charge and work up in .5 gr increment. I usually don't go up to max powder charge. I'll shoot these loads round robin style to find the powder node.
Repeat the above process with the powder charge being static and reduce the seating depth from .003 off the lands in .005 increments. Round robin again to find the seating depth node.
Once you have both of those dialed in you can rinse and repeat the process in .1 gr powder increments and .001 seating depth increments from the established baseline above.
Again that's just what I do and everyone has their own process.
http://www.hornady.com/store/Lock-N-Load-OAL-Gauge-Straight-1Each/
