When butchering, you get more material when using the Butchering Table than you do butchering in the field. Using one pig carcass as an example:

Field Butchering:
Bones: 576
Emalj: 86
Fullgrain Leather: 432
Pig Meat: 2880
Tallow: 225
Vendor Sell Value: (44s, 57c)

Table Butchering:
Bones: 800
Emalj: 160
Fullgrain Leather: 800
Pig Meat: 4000
Tallow: 250
Vendor Sell Value: (64s, 90c)