Michael,

I hunted a good bit this past year running the 140 gr Barnes in the Federal factory loading, taking deer, hogs, and exotics with a 9" barreled .357. It's pushing a little bit faster than your GP due to barrel length, but I was impressed with the results.

Also took a couple hogs with the 158 JSP's in an 8 3/8" S&W - with a softer bullet, I approached it similarly to bowhunting. Wait on your shot angles and go collect your game.