My tractor is slightly larger but found spreading rock using FEL to be pretty easy and fast. Learned this after watching guy on skid steer do it.
Simply fill the bucket and with the bucket elevated where you can see the rock fall, SLOWLY curl bucket forward while backing up. Coordination the bucket uncurling with backing speed takes some time but with a little practice you get the knack of it. When thru with the pile of gravel, can use loader bucket backdragging to smooth it out.
What took me the most time to learn was making small blade adjustments using more passes rather than trying to do it taking larger bites.