I had a Pact PC2 chronograph, and it's a good one.....gives all the calculations you'd ever want to know.
BUT
After several years of using it, I decided that the holes on the target are a better indicator of accuracy.
I sold my chronograph, and have never regretted it. If you have a workable and systematic method of determining the best load for your rifle, you'll find the best load without any more load experimentation than required with a chronograph.
I suspect a chronograph is a "frustration factor" for some reloaders. This is because they concentrate on hi-lo and SD readings, rather than what is happening on the target.....and what happens on the target is the FINAL indicator of accuracy.
If I were a competitive bench rest shooter, I don't think I could do without a chronograph....but, most of us are not fine tuning our loads that will equate to hundredths of an inch at 100yds.
Chronographs are a great toy for the average reloader, though. It will definitely give you a better mental picture of the mechanics/physics of the intricacies of precision shooting. If you have the desire to have one, by all means, get it.....and use it. I'd recommend the Pact PC2 for those considering purchasing one.
hog