Exactly. You have ten round mags for a rifle you don't own and they fit one you do own there can be only one purpose for having them. They didn't limit semi auto center fire rifles to 5 because they are afraid of the magazines. This is very much a loophole. Another example of a poorly written set of laws.
Having a conversation about this is useful. I learned something. It makes no sense at all but that's fine. I won't be running out and buying any. I have plenty of big 5 round mags.
It's not a loophole though... not at all. It's only a loophole to the gun grabbers who can't read english and think the words say something they don't. Do they make sense? Not really at all, but they are written in a very clear and specific way that can only be interpreted one way.
If it were a loophole, the RCMP wouldn't post a bulletin saying explicitly that it's fully acceptable to do and that they sanction it. They clearly say that they interpret the rules to limit the capacity of a magazine based on whatever gun it was designed for. It doesn't matter if you own the gun (I think they even say that... or it might have been in an email that was posted from on of the head lab techs), it doesn't matter what gun you put it in. If the gun was designed with the express intent to be used in a pistol, or a bolt action rifle, but also fits a semi-auto centerfire rifle, then the magazine limit only applies to the gun it was DESIGNED TO BE USED WITH and the AMMUNITION IT WAS DESIGNED TO BE USED WITH. Hence, technically, one could bring in/make a purpose built .50 Beo mag, designed for a .50 Beo PISTOL, and use it in their rifle and legally be able to use 28-30 rounds. The only hurdle here is getting it approved by the RCMP, which I have my doubts about actually happening.
As they showed with their "approval" of the Elander mags, which were originally going to be available in 10 and 20 round capacities, they would not allow the 20 round ones based on a DIFFERENT interpretation of the laws than they had previously used. The issue probably could have been taken to court and fought, but the cost would have been tremendous and likely would have resulted in a re-writing of the laws.
But again, there's absolutely no way you could be convicted for using a 10 round AIA mag in an M1A or a 10 round LAR pistol mag in an AR, or a 5 round Beo mag in an AR (with 14-15 rounds in it). No way, not at all. Could you be dragged through the courts? Possibly, though I'd suggest that the most that would be likely to happen is you end up in trouble for an afternoon until a lawyer or your buddy brings in a copy of Bulletin 72 for them to read, at which point they'd have no choice but to release you. The only other thing that *may* be wise to do would be to have some Beo ammo on hand to demonstrate that it only holds 5 rounds of that kind of ammo....
edit - and now I finish reading the thread and see this is over... nothing to see here lol