The bore dimensions quoted are CIP, subject to my typos. If SAAMI says different, that's just too bad for SAAMI.

The RUAG Ammotec "Wiederladen" manual (which includes the dimensions quoted) has words to the effect: 308 will work in the Swissicon, but 307 would be more suitable. And since that is the Swiss concern that makes most of what the Swiss use, I am prepared to accept that they know what they are talking about.

Patrick