I bought some of the Win. preprimed 54r brass back several years ago when it was pretty cheap at around $30 per 100 pieces,it's made by S & B of the Czech Republic who loads some of the metric cartridges from Winchester.
Haven't had any issues with it after many loading,I mainly use it for my cast bullet loads. The brass comes primed with the S & B LR primer. Brass below is reprimed using Win. LR primers.