I do not own a Freedom Arms firearm due to the cost. I can tell you that I have handled them and they are truly a fine firearm. The cylinders lock up like a bank vault and they are manufactured from top shelf materials. I have owned a TC Contender and I have 2 Handi rifles. I believe that the design of the FA, plus it being a revolver with barrel support on the top and bottom of the barrel, would make it a stronger platform than either of the breech loaded firearms mentioned previously - therefore I believe that the FA would support higher pressure loads than the TC or Handi platform.
Paul