I've got the Lee 310gr RN-FP mold, (the 44 version of those 357 molds that Jeff did the group buy on). Anybody tried these in the Handi? I failed to order a 44 mag barrel in time.
Last I knew, the F1 chrony just told you the velocity of the last bullet over the sensors. If you want to keep the data, you write it down before you shoot again. The other models, Alpha-Beta-Gamma-Delta-whatever, have varying amounts of memory so you can scroll through the velocities later and some of them compute average, standard deviation, etc.
The master models have the remote display so that you can put the chrony 10-15' in front of you and have the display on your bench.
I bought an old red F-1 several years ago when they were selling used refurbs for something like $40. You might contact them and see if they still do this, but I doubt it's going to be $40 now.