Maynard - I originally bought my 550B quite a few years back when I shot IPSC and Service Rifle, and I presently use it for F-Class F-TR (now you know one!). I've crunched a lot of primers over the years, mostly due to sloppy removal of crimps in military brass, poor set-up of the primer feed and/or a dirty machine, and even used enough force to make a primer detonate (which made me rethink how I removed the crimp, plus safety glasses).
My only point here is that a progressive press like the 550B can make quality long range ammunition. I agree that you can't do so by using the same principles as pistol reloading, with dumped powder charges and range brass - I needed to look at quality brass, tool head clamp kits, weighing each charge, Redding Bushing dies, etc. And it works - I'm very satisfied with the set-up (which still has three operations going on each stroke!) and the results (doing pretty well in F-TR out West) with my Dillon.
Bill