I say all of what I'm about to with respect and politeness

; please don't take any of it as a personal affront, attack or insult ....

...:
That was my point. Because they are designed for something that is allowed to have magazines of that capacity, the magazines themselves aren't prohibited devices.
I refer you to the Canada Gazette:
http://canadagazetteducanada.gc.ca/archives/p1/1998/1998-06-20/html/reg1-eng.html
where it (basically?) clearly indicates that any and all cartridge capacity limitations are relegated to
the magazines themselves, and that cartridge-capacity-limits exist
independant of the firearms that the cartridges/magazines may be used in. Looking at the title of the section:
Former Cartridge Magazine Control Regulations
it seems
pretty indisputable that all regulations pertaining to cartridge-capacity are rooted in the type of magazine itself and, as such, no "cartridge-capacity-limitation" (consideration/regulation) regarding
firearms themselves was ever created/passed....

......
But nowhere in the regulation that allows those magazines to be used in the guns for which they were made does it say a centrefire semi-auto long gun is allowed to be used with a magazine with a capacity over five rounds provided the magazine was designed for a different gun.
Per above

, the regulations were designed for the magazines themselves, and so the key consideration (as
CanAm so rightly and succinctly indicated

) is (a) what cartridge
the magazine itself was designed/manufactured for use with and (b) what firearm
the magazine itself was designed/manufactured for use with

. Let us read from the aformentioned source?
Former Cartridge Magazine Control Regulations
3. (1) Any cartridge magazine
(a) that is capable of containing more than five cartridges of the type for which the magazine was originally designed and that is designed or manufactured for use in
(i) a semi-automatic handgun that is not commonly available in Canada,
(ii) a semi-automatic firearm other than a semi-automatic handgun,
(iii) an automatic firearm whether or not it has been altered to discharge only one projectile with one pressure of the trigger,
(iv) the firearms of the designs commonly known as the Ingram M10 and M11 pistols, and any variants or modified versions of them, including the Cobray M10 and M11 pistols, the RPB M10, M11 and SM11 pistols and the SWD M10, M11, SM10 and SM11 pistols,
(v) the firearm of the design commonly known as the Partisan Avenger Auto Pistol, and any variant or modified version of it, or
(vi) the firearm of the design commonly known as the UZI pistol, and any variant or modified version of it, including the Micro-UZI pistol
It's perfecty alright to say that the design
of the firearm makes a difference - so long as we realize that it is only the cartridge capacity of
the magazine itself that is effected by the design of the firearm (for which the magazine was designed/manufactured to be used with).....
People may use them and probably nothing will be done about it for a long time, if ever, but if someone is ever charged, a court could decide the regulation against having a centrefire semi-auto long gun with a magazine capacity greater than five rounds applies to improvising with magazines from another gun. Then we'll see how it turns out, but it may never happen.
More on this later.....

.....but, IIRC, the fine folk at Questar have already gotten "clearance" on this all?.......

...
that, and what we've discerned from the Canadian Gazette, above! ......
