I think I published some of these dummy rounds before but I have found some new information on a couple of them. It appears the two dummy loads on the left with the broad and deep grooves (one painted orange) and the flat tips were made by CAB Enterprises in Wanganui New Zealand. I don’t know when they were made, but it was within the last decade I suspect. I do not know who they were made for.
The two dummies on the right may also be from New Zealand, but they came with no information. Perhaps one of our Forum members from down under can identify them.