Rohann,
The Winchester ammo is made by S&B, and is not available in Canada (or wasn't when I e-mailed Winchester a while ago, anyway). There is no such thing as milsurp 7.62x54 that isn't corrosive, regardless of what the advertisements say. Either use the civvy stuff, or just use hot water to clean your bore after shooting milsurp. The S&B is probably your best bet, as it's fairly cheap, truly non-corrosive, and reloadable (if that applies to you). I think you should be able to find S&B in any halfway-decent milsurp-type shop in your area.
Cheers,
Michael in Edmonton