We went through this in a differant form last week with a cast that was always headed left at the end. This is an absolute, the line will follow the path of the rod. if you tail your loop the tip of the rod droped below the starting point and ending point of your stroke. A good stroke is slightly convex. the more convex the cast is the biger the loop and a concave cast will always tail the loop. it is not generaly caused by to much power but power applied to early in the stroke. This is from Gearge Cook the Sage Rep. " wear a long billed cap and never apply the power untill the rod is past the bill." It works try it.

Rich