Even Ruger does not recommend ammunition not manufactured to US specs (see page 12 in their manual), which is probably standard lawyer speak CYA... but could very well be performance related and/or safety advice.
My mini30 is one of the older makes and its a hit or miss proposition using the russkie or chinese ammo my SKSs & AKs love.
Tagged to see what response new Mini30 owners have to say.
Youth rebels, age conserves; between them, they advance. The Marines will cease to win battles the moment either camp achieves ascendancy. – Robert Leckie, Helmet for my Pillow