Realistic western movie seen in 70-80's

So, there's a western movie my father saw in 70's or 80's and he'd like to see it again. So, all we know about this movie is that it was very realistic, there weren't any fancy vest's, town's, seriffe's and so on. It was also realistic in a way that it might take over 6 bullets to shoot someone... Also the movie had a few winter scenes and it might be from Kanada. It also had colours. If you have any idea what movie this could be, please post it here. Me and my dad would appreciate that. Thank you.