I load a 158 grain Hornady XTP with 14.8 grains of H110 and this load clocks 1610 fps from my 20 inch Winchester 92. BTW, it's a 1904 vintage receiver that was rebarreled in 357 Magnum by Winchester for a previous owner some years ago and it will shoot at a bit less than 1 MOA with this load.

Concerning the XTP line of bullets Hornady offers the 357 bullets in either Flat Point or Hollow Point variations. For a Hog I suspect that you may want to see if you can find some of the Flat Point version, they are more resistant to coming apart and should, in theory, produce a bit more penetration. As for the Hollow Point version, they are a limited expansion design per Hornady and do work well on White Tail Deer but even better is the difficult to find 180 grain XTP in 357. BTW, just checked and Midway has the 180 grain XTP's in stock.