You're right about the clips for the 7.92 calibre rifles. I don't believe they were conversions though. I believe, Steyr purposely built those rifles. Not really sure why though. Lots of speculation on that subject though.

If you're interested, I modified a 7.92x57 mannlicher schoenauer clip to fit. It's a bit sloppy but works well. The rifles don't respond well to single feeding.

Many Carcanos were sporterised by Internation Firearms in Canadaicon. One of the things they did, to add value. was modify the trigger/mag housing to a double set trigger configuration. They misled many into believing the rifle was chambered in the 6.5x54MS, by only stamping 5.5mm on the barrels. I never heard of any accidents but it certainly POed a lot of people.