So I checked out those mkz bullets OMF!!!120 SST is very lethal but is a fragmentation bullet so I don't use it as a meat hunter. 100/110 Nosler AB are very effective and retain their weight well for above average penetration for a lead-core bullet. If you reload, CavityBackBullets.com have a 105/120 MKZ that is the bullet to beat. They are a copper bullet with 3-pedal expansion that causes massive hemoraging and a tri-star wound channel. More info here.
There is useful information spread throughout this topic regarding six8 bullet terminal performance. As it has grown in length, these links have been added to take you directly to pages where new bullets and additional testing were added. 100 Yard Terminal Testing; Barnes 85gr TSX & 95gr TTSX...www.68forums.com