Loading will save you some money compared to store bought ammo. I use only jacketed bullets which run about $.08 each. This runs completed ammo up to about $7.00 a box of 50. Walmart has Winchester USA in the 100 packs for about $20 = $10/box of 50. Savings = about $3/box of 50.
More importantly, loading gives me some control over what I shoot. I can tailor make any of the calibers I load to suit the conditions I shoot. For steel plates, I use a 20% load behind a 180 grain (.40S&W) FMJ in my Glock 23 for quick recovery time. The same load won't reliably function my Ruger P944 - I use a 95% load for it for plinking, plates and IDPA. I load differently for my Smith J, K and L frame .357 magnums to minimize the pain of recoil, especially for the J frame. So, I guess one of the things I'm saying is that loading provides you with all kinds of flexibility in your shooting needs that buying store bought ammo will not allow.
Another benefit of loading is that I spend several hours each week reloading, in peace and quiet, away from the boob tube. When I load (4 hole turret press used as multi stage single state - indexer disconnected) I tune out the world and all my worries and problems and just concentrate on what I'm doing. I guess it's therapy, but whatever it is, I like it.
Just one word of caution, loading/reloading is addictive and the bottom line is that you really don't save a cent. You just shoot more for the same money.