Hi everyone, I've been browsing 7.62x54R ammunition in the local gun shops and also online and have one thought. Does the color/metal type of the casing affect the flight of the round? Just wondering, because Romanian and some Russian is a darker red to brown; while Tul ammo and Czech are black and seem to have a lighter feel. This is all aside from any of the American manufacturers who make new rounds in shiny brass. Am I over thinking this?