This is pretty much how I start with a new load, Gary. The approach is sound as it uses as many sources as is reasonable or possible, and statistics are then applied to the data. This helps to identify outlying data which can be excluded with good reason. Publishing errors aside, this approach keeps me from favoring or discounting one data source over another based upon how I "feel" or "think" about it or what someone else says about it. Use as much data as possible, run the stats, start at the reasonably low end, extrapolate if necessary, work your way up checking for pressure signs, and you will do well. But this approach has been handed down to us from many, many more wise and experienced reloaders than I on this forum and elsewhere.