Daryl, yes, Tradex is reported to be an excellent source for the Swede rifle in Canada. In fact, based on my experience with SARCO, and the guns reportedly purchased from Tradex on the Swede forum, I think Tradex is the better source, but as you say, limited to Canada.

Allan's Armory in the USA is an excellent source for the Swede guns.

Husqvarna made quite a few factory 9.3x62's. And...the magazines are too short for many factory 9.3x62 loads. I do not believe the Husqvarna book even makes mention of "why". Speculation of course, but I suspect the reason is merely the economics of available actions at the time the guns wre made. Shooters just made-do. I do not know what the OAL was of commonly available Norma ammo at the time these guns were made. Maybe some loads fit at that time?