Try the Penn 320 GR SSK.
These out of a Ruger 77/44 will pull good grouping at 100 yards if you can get the drop figured out. One of these took a 230 pound deer last season and dropped him in his tracks and did minimal tissue damage.
If you go to Penn’s web site and open up there 44 cal bullet section, then click on the 320 Grain SSK bullet. There is a “click here” button on a very good article from Handgun Hunter using the bullet.
I have hunted pigs in the past. It’s one tough animal that you want penetration not expansion.
http://www.pennbullets.com/44/44-caliber.html