I bought a 715T some time ago as sort of a joke - it was just about the ugliest ball I'd ever seen.  Soon it became my first ball out.  After a while I decided I needed something weaker, so I wrote Track asking advice.  They suggested the 300T would be about 5 boards less.  I couldn't be more satisfied with the pair.  Both drilled pin over middle finger, cg just outside ring and MB about 2 inches from thumb.  They're a great combination.