7mm Remington Magnum striped silver dummy

The blackened case dummy cartridges are pretty common, but I have never seen one of these striped silver examples before. It has a soft point bullet, and the case, aside from lacking a primer pocket, appears to be standard. The silver finish was not intended to be very durable, as it can be scaped off easily with a thumbnail. The lines on the case are on a piece if plastic ‘tape’ that wraps around it.