Primer Tray Funnel

thingiverse

This is a primer tray funnel. It makes loading square primer boxes into round primer trays easier. I took my measurements from Federal primer boxes and the round Lee Auto Prime round trays. If you want to customize it, the RCBS primer tray has an inner diameter of 95 mm, the LEE (for the loadmaster) has an inner diameter of 82.9 mm. If using Federal primer boxes, set the inside width to 89 mm. If using CCI primers, try setting the inside width to 76 mm, or use the Primer Box Spacer and the Primer Tray Spacer... How I Designed This I used calipers to measure the dimensions of a Federal primer box and the inside diameter of my primer tray. I then worked out a way of connecting the two...