In the photo below there are 5 chargers for the Swiss 7.5mm rifle cartridge. Those in the upper row are coloured brown indicating that they are for ball cartridges. The two in the lower row are coloured purple for armour piercing rounds. The left hand charger in each row has a single pressed stiffening/guide rib near the bullet nose whilst the remainder have a second rib at the case neck level. The single groove type is the earlier version, does anyone know when this charger was introduced and whether it has a model number attributed to it?
The two earlier types also lack the internal steel protective strip which prevents the bullet points digging into the card. This strip is present on all of the two-rib types that I have examined so perhaps the second rib and the anti-wear strip were added when spitzer bullets were adopted, just a guess on my part. Does anyone know at what point the two-rib style took over and what model number, if any, it has?
The four round (top right) version of the brown ball chargers was used in rapid fire competitions where ten rounds were required to be fired. Each shooter had one four round and one standard six round charger to make up the ten shots. Does anyone know when this type was introduced? And now, the tricky one, if the single rib type without a steel anti wear strip was for round nosed bullets, how come it is coloured for A.P?