Myfriendis410, you definetly do not have to use an ammonia based cleaner for copper use Bore Tech Eliminator, it beats ammonia based cleaners hands down.
Also what kind of accuracy and performance do you get from that .284 TTSX 140 grainer?
Have you taken game with that load? and have you recovered any bullets from that loading?
I also have read where Barnes changed the tip of their bullet so it wouldn't be prone to "pencil" through game without opening up.
Thanks for coming!