Forster large primer feed tube
The tube bottoms against the flat surface of the primer housing in the Co-Ax Primer Seater. The bottom of the tube must be funneled in slightly for proper functioning.
For several reasons, the tube is made of a light, soft material which may be bent, filed or trimmed with a penknife. The slot in the tube also permits visual inspection to determine if any primers are reversed.
Works like a charm. This is the best hand priming system i have ever used.