RE: czechoslovakian ammuntion
If you mean Sellier&Bellot, they are much better than before. Nowadays they even load with premium bullets. Their weak point in my experience is the brass, not possible to reload over and over again. It seems that it is too hard or something. But if not thinking of reloading they are ok. I have used much their .308 bullet in 147 gr FMJ for training and the groups are good.