"It's all in the wrist action/swing."
So if I can summarise, you're saying that your inadequate size can be compensated for with technique? I have heard such tales before but I've seen nothing to convince me it's true. My mighty tool can't be measured in ounces, it's a multiples of kilograms implement.
Of course, even the mighty hammer of thor has its limits, which is why I have a hide mallet and a similiarly ancient pair of ball pean hammers (stolen by my other grandad from the merchant navy), and a small tacking hammer (bought by me) and of course a nice claw (stolen by me, from my dad) and the ever-satisfying deadblow hammer. All grades from fine to course.