Is there a way to add draw time to a ranged item?

Nope because it's surely very hard to make, and I believe that for the moment, you would have to code.

Ik this is an old  topic but it is on the top of google so here is how to change it draw back time

Open it with code and look for the 

        @Override

        public int getUseDuration(ItemStack itemstack) {

            return 72000;

        }

and change the return 72000 to any value you want