WiscBowHntr82,

You misunderstood...I already have CX 300s that I have shot for years using my old bow. I have yet toshoot my switchback since it's still on order. The old arrowsmay or may not be spined correctly for the new bow. I am only going to use these arrows to break in the new bow for string stretch.Once broken in...I will figure out what arrows I want for the new bow based on draw weight ,length etc... My draw length on my old bow was 30" the new SB is 29" which fits me better then the 30". Once I figure out what settings are most comfortable on the SB I may go to a different spine. I have not yet ordered any arrows.