I reload for the four 9mms that I own...Each has a different combination of component factors for accuracy...If all you are planning to do is fun plinking, buying cheap factory ammo may be your best way to go, but if you want to build confidence in your shooting ability, custom hand loads are the best way to achieve it..When you know you have found the 'perfect' load for your pistol, the only work needed then is on your eye/hand muscle skills...But, initial set up reloading costs can cut into your budget if you don't shoot a lot....
Very few semi auto pistols will have the same exact recoil spring tension and since they headspace off the case mouth, the more exact you trim and crimp can also make a difference...