Vesi

I don't own a Tikka rifle, but I've shot them many times, some friends of mine use them. And they are very happy with the quality & performance. As for polymer magazines, I've seen both polymer & steel mags. In cold weather they are easier to handle. You can judge the quality: its like the rest of the rifle. Absolutely perfect. And then this, magazines are the kind of part you might want to replace from time to time, granted, some are very durable, some are likely to wear out over time. I wouldn't worry about it, just get yourself some spare magazines. Easy way to carry ammunition in the field too.
As for quality, just think of Sako's reputation...they've never built something bad before and aren't likely to do so ever.

Kind regards,

Vesi