500/465 Nitro case variations?


On the left a Kynoch fired case that matches CIP dimensions for this cartridge. On the right a unfired A-Square case that has a much lower shoulder (about 1.950" from the rim)
Does someone have infos about case variations for the 500/465 Nitro? Does someone have a-square brass that match the sample on the right?

Here http://www.cartridgecollector.net/500465-nitro-express you can see some differences between the various samples but modern brass/cartridges should match standard CIP dimensions