The Hornady kit covers just about every caliber you'll run into.
The bushings are not caliber specific, they cover a WIDE range of calibers:
http://www.hornady.com/store/Lock-N-...h-Body-1-Each/
While they're called "headspace gauges" (and they are), they're just a means of establishing a comparison between the datum on your fireformed cases vs. your resized cases. Can't FL size accurately without that information.
By keeping shoulder bump to a minimum, you maximize your brass life and-far as I'm concerned- eliminate any "advantages" to neck sizing.