Surely it is plowerful enough - --
- - -From the standpoint of foot pounds of energy. And the big ol' bullet is plenty heavy enough.
Only aproblem I see is that the velocity is pretty modest - - - Might make the trajectory problematic. From what kind of pistol do you shoot this load? With a Ruger or Contender, you can easily drive a 300 JSP at 1000 fps with HS-7, and faster still with 296, so you could do at least that with a hard cast bullet.
Even with the more lightly constructed revolvers, HS-6 can propell a 250 cast at over 900 from a six-inch barrel. This is still plenty of bullet weight to do the job on a deer.
The flatter trajectory makes it much easier to make a good hit at varying ranges. and. really, good hits are really what bring down game in a sporting manner.
Best,
Johnny