Big ones ALWAYS go back.....
As SYN has stated, the contaminant level increases with the size and age. Only common sense that the lomger the fish lives, the more it will ingest...
Plus the bigger fish are also the good breeding gene...
The slots or keepers are always better tasting, and if you want a mount now a days, the taxi's don't use the fish for mounts. Most just go by the pics and measurements to build ur trophy.
"A picture is worth a thousand words"
Take a few quick pics then release so others can enjoy the fight....
Will