you need to do more on the leg presses if you want to get thicker. 380 is good and all, but that will just keep you strong.
Try and do one set at 10-12 reps (whatever your max is you can get 12 out at), then go straight into 10 short movement presses (from near locked out extended to just a few inches back -- you should be able to really feel it on the outside of your thighs). Then use the leg press to work your calves.
Next 2 sets should be your max weight for 5-7 reps of full presses followed by the same mini presses and calves. (to me the whole thing is one set)
Finally your last set should be whatever just about kills you to do 5 of. They should really make your head want to explode. THAT will make your legs grow.
Plus working the upper legs causes your body to up its natural production of HGH.
I went from 360 - 550 in about 6 weeks doing this and added several inches to my legs.
For the calves you should do 12-20 reps each set, with 3 sets making up the total set - one with feet straight, one with heels touching, and one with knees and toes touching. You'll feel like you need to throw up after each full set, but you get really sexy legs!