Prohibited device
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,
Bla bla bla
(2) Paragraph (1)(a) does not include any cartridge magazine that
(a) was originally designed or manufactured for use in a firearm that
(i) is chambered for, or designed to use, rimfire cartridges,
(ii) is a rifle of the type commonly known as the “Lee Enfield” rifle, where the magazine is capable of containing not more than 10 cartridges of the type for which the magazine was originally designed, or
(iii) is commonly known as the U.S. Rifle M1 (Garand) including the Beretta M1 Garand rifle, the Breda M1 Garand rifle and the Springfield Armoury M1 Garand rifle;
In short they are not limited to 8 rounds. The garand and any magazine designed for it is completely excluded from capacity restrictions. Someone could make a 100 round drum for it and it would be legal