Picked up a new putter recently, and after ~5 minutes of putting on the carpet at home I noticed the ball marks were a bit high on the face.
Somewhere around here:
Tight grouping, but high.
Seemed to be rolling it well enough; although, it did feel a little dead/slow.
I have suspected this for a little while, but on my other putters it's been difficult to know for sure as they both have grooves, and there's never any ball marks.
Any ideas?