https://thecastlearms.com/product/ginex-50-bmg-primer-box-of-136-primers#product_detail

Unis "Ginex" d.d. Gorazde has developed a sterling reputation for reliable, high quality primers. Their 50 BMG Primers are no exception. 

 Featuring a sleeve of 136 primers, these Unix 50 BMG primers exhibit good workmanship. During all stages of production, primers are subjected to strict control, especially of raw materials and semi-products which have influence to the quality of final products. Final products are subjected to 100% mechanical and visual and dimensional inspections, after which products are subjected to sensitivity, transport and hermetical tests.