Points problem

[Gino]

Hi, funny thing happened on way home from a car show. A started running poorly then back fired, loud, twice and died. It appears that the copper band of the points wore and shorted out on the cam to the point where as the band snapped. These were very new points only in the car for two weeks. So I have two a's, I put new points in, and then compared the points with my other A. The copper band on the new points come very close to the lobe on the cam. About 19 thousands clearance. The old points have much more clearance is this normal should I complain to the supplier? Thanks for your help.