[amamnn]

Wrangler I think you must have an older version. My program came with all the cables and etc....I save my data because it can be that I might change my mind about a load somewhere down the road. I've had to change powders from time to time, due to having got the extreme of the variation in density in the bottle I used to work up a load. Or at least, that's what I figured when the new bottle gave me different results. Then I try to work back to the best results.
Also, the program I use helps to work up the load by taking known data and extrapolating from that--helps shorten the process a bit. For example, I can use the data collected from a few strings to predict the POI of a particular load that I liked at 600 yards to see what the drop might be at 1000 yards and I can juggle the major variables to predict what the load might do--rather than trying to change the powder charge weight or powder type by trial and error--and etc....