I'll agree it is a bit vague. CIP tested cartridges of 65mm. or 67.5mm. are usually o.k. in 2 1/2" chambered English guns that are in proof. Certainly the stated pressure are well within bounds. European CIP testing is different to the U.S. system and are a guide to use in guns that have gone through proof testing to recognised and agreed test procedeure. The American system being different as it has no recognised Proof laws. I've not come across these brands in the U.K. I note that some are loaded with as small as number 11 shot and also .410 slugs. If the Greeks are anything like the Maltese and Cypriots they will shoot just about anything and everything. If it flies it dies and that includes butterflies in some areas as I believe all the birds have been shot out. They cause a bit of an upset in Europe with their habit of shooting rare birds that are migrating into mainland Europe to breed. I know that doesn't answer your question but does go some way to explain their extensive range.
Looking at what they say they seem to use Italian made cases, primers and wads and Italian and French made powders. What the Hungarian connection is I know not. we did used to get Hungarian cartridges here in Britain that went under the name Nike. Lagopus.....
