I traded for a lightly used T3 tactical last year chambered in 308, it has a 20" tube.
It shoots 165 Sierra SBTs and 168/175 SMKs into itty bitty groups at 100, my best 200 yd. group so far is just a squeek over .5. Granted, this is not your go-to rifle for mountain hunting but it isn't much heavier than the Rem 700 DBM that I used last season either.
I don't own any other Tikkas but I sure wouldn't be affraid to try out another, like others have said about the trigger and smooth action-all true.