Loading for my .30-.30 and .308 seem to save me much more money than loading for .38 or .45. The biggest benefit for me of reloading for the rifles is that I can make some soft shooting rounds for practice. That's basically why I reload for .45, too, to create some rounds that just barely make power factor for IDPA and IPSC. The power floor in those sports if you're using a .45 is 165, which means a 165 grain bullet at 1000 fps. Most factory .45 ammo is much more powerful, probably up around 180, so recovery between shots is very slow with the commercial ammo. Now there may be some inexpensive target commercial .45 loads I know nothing about that are lighter than the typical commerical loads. If so, fill me in!
I'm still just a beginner at reloading, but I can truly say I never really understood ballistics until I started reloading.