Well, first of all, working your pecs is working your pecs - genetics decides the shape, not how you work them. But yes, dumbell bench press does provide a much greater range of motion, allows you to bail out relatively safely, and also makes sure both sides progress at roughly the same rate. However, the use of the barbell bench press is often that you can get more weight on it; it can be a real pain with dumbells. But, yes, dumbell bench press is probably the way to go... too bad my gym's dumbells only go up to 35kg or something
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