"Non-restricted rifles being used for hunting are limited to 5 round (with the exception of the M-1 Garand)"
"Slugs, you are allowed 4+1 for auto-loading shotguns"
Where do yo get your information from, can you provide some quotes or links? Before you give advice, you should study up a bit.
The original question was asking if there is a limit on rifle rounds when hunting in BC. There is not. There is only the Firearms Act rules for semi-auto centerfire rifle magazines limited to 5 (with the garand exception) and pistol magazines are limited to 10. A Pistol mag can be used legally in a rifle in Canada. Here's the Questar LAR quote off their website
"Questar's 10 Round LAR-15 'Pistol' Magazines fit all standard .223/5.56 AR Rifles and Pistols...
Classified by the RCMP as 'Pistol Magazines' they are manufactured exclusively for Questar by Ammunition Storage Components (ASC) using the same drawings, dies, etc. previously used by our last supplier, and are legal for use in BOTH AR Rifles AND AR Pistols." or anything that take an AR magazine.
And 4+1 in an autoloader shotgun, where does it say that anywhere? Semi-auto shotgun magazines cannot hold more than 5 of the longest shell they are designed to take. So, a 2.75" - 3.5" gun is limited to 5, 3.5" shells in the magazine. That's it, it cannot hold 6 3.5" shells in the Magazine. With that same gun, you can legally load 6 or 7, 2.75's in the magazine and another in the barrel. There's an RCMP letter about this too, I've posted it before.
Hope that gets you started.