When done correctly, kettlebell front raises will get you huge shoulder gains by working front deltoids. Targeting that specific group will recruit more muscle fibres and help growth in the shoulder area, because regular presses don't involve this muscle group much.

I use a kettlebell for this exercise, but you can replace it with a standard set of dumbbells or a barbell. It really doesn't matter what you lift as long as enough resistance is generated to stimulate targeted muscles.

Preparation:

1) Take a two-handed overhand grasp on a kettlebell with your elbows straight or slightly bent. Bending your elbows makes the exercise a bit easier. If the kettlebell is too light for you, then grasp it one-handed.
2) Your back should be straight and knees slightly bent. Rounding your back will get you a serious injury.
3) Don't lean backward or forward.

Execution:

1) Start the exercise with the kettlebell at the thighs.
2) Raise the kettlebell in front of the body forward and upward to a maximum of eye level.
3) Lower and repeat.

Pawel Recommends:

1) Reps need to be executed slowly. To make your muscles work even harder, try pausing for a second or two at your favourite points of pain!
2) Keep your core motionless at all times, no torso swinging is allowed!
3) You should feel conformable at all times while doing this exercise. If you feel tightness in the shoulder capsule, you should decrease the raise height. Usually, raise height just above your shoulder line is fine.
4) Don't get your elbows bent too much or arms too far around because this will transform your exercise to side lateral raises.
5) If you feel discomfort in any part of your body, back off immediately!