... TSX I'm coming home baby.
Unfortunately the TSX and the new TTSX (see below) will always be plagued with the copper problems that we all know about. The thing I love about the E-tip it's jacket contains Zinc so it shoots, produces pressure, fouls, and has the same accuracy traits as a cup/core slug.
http://www.barnesbullets.com/resources/newsletters/bullet-n-archive/august-2007-barnes-bullet-n/