If the removal of the QLA voids the warranty, so what. You can order another Encore barrel for about the same price as one of the Bergara barrels. Also there is no guarantee the Bergara barrels will shoot the conical's.
Bergara does have a guarantee that they will out shoot any factory TC barrel.
From what ive seen on a couple forums, TC has major problems with their QLA's and can not get them right. Ive heard the .45 encore barrels were junk and tc wont replace the .45 barrel with another, that they will just replace it with a .50 barrel.
i saw one guy had to send a brand new tc triump back due to a bad QLA. BAD QLA seems to be nothing new with TC.
cva,traditions, knight, dont seem to have this problem.