best subsonic hog round
 

which would be the better .300 whisper subsonic round for hunting hogs at between 50 and 100 yards

I'm looking at possibly:

the 220gr Sierra Pro-Hunter
http://www.midwayusa.com/viewProduct...tNumber=698190

the 220gr Sierra MatchKing
http://www.midwayusa.com/viewProduct...ber=1482403505

the 240gr Sierra MatchKing
http://www.midwayusa.com/viewProduct...ber=1482557247

or the 208gr Hornady A-Max
http://www.midwayusa.com/viewProduct...tNumber=915881

I'll be using a 10" Contender if it matters