Uh no, some people have heavier bones but the difference is in grams not pounds. No one is born with huge striking power its a myth, technique is key. A good striker throws all of his weight into every punch and that plus the rate of accelaration equals force. Fox example, look Valuev, the Russian boxer, hes hugeeeee massive weight but he punches like a bitch, why?? because he doesnt plant his weight correctly and his hands arent fast enough. If you want to see devastating striking power look at Vladamir Klitschko, because of his technique he has some of the most accurate and heavy hands in boxing.