One advantage is you can load shells that are not available commercially.
I load 7/8oz at about 1200fps in 12 ga. Virtually no recoil in my Cynergy Sporting. Next to none in my Citori or my Bernadelli Gamecock SxS.
I had loaded 1oz for years, dropped to 7/8 while recovering from bypass surgery, never went back. My scores (sporting clays) are the same as when I shot 1oz, and I shoot better with my reloads than 1 1/8oz factory Gun Clubs. My son shoots equally well with all of them.
By dropping to 7/8oz, using Promo powder (a bit dirty), and buying in bulk I'm in at about $3.85 a box. Plus, it's therapeutic cranking out 4 flats of shells every month or so.
BTW, the cycle my Win 1400 and a friend's Maxxus no problem.