Building big shoulders is easy if you know how to do it. The deltoids consist of three parts: The anterior (or front), the lateral (or side), and the posterior (or back). In order to fully develop the shoulders, you need to build all three of these heads.
Your front delts are stressed through bench presses and shoulder presses. You normally don't have to perform an isolation movement for the fronts. And the rears are stimulated to a lesser degree by bent-over rows and lat pull-downs. However, your side delts really are not worked out at all by the complex movements advocated here at Muscle-Build.com. Therefore, if you want to build big shoulders, you'll need to supplement your weight training with some isolation moves.
Here's a great delt work-out if you want wider, more developed shoulders:
This shoulder routine will blast your delts and force them to grow. If you want barndoor-wide delts, follow this work-out routine.
Look, I know how hard it is to build muscle. Trust me when I tell you it took me 20+ years to figure it out. But once I did--BAM!--muscle appeared almost overnight. Give me your email address and I'll send you the keys.