USPSA has hardly any limitations on revolvers. It looks to me like you are in good shape. See for yourself on page 84 Appendix D6 at
http://www.uspsa.org/rules/2010Handg...sProof3web.pdf
Are you going to load Specials, that 158 at 792+ fps for Minor power factor or Magnums (or Specials +P+) 1044+ fps for Major? I suggest the former.