I got a tin's worth of it in a trade and am very pleased with it's performance. It is of chinese origin based on my research, sealed at both ends with what I assume is blood of the capitalist. It has been very accurate and reliable out of both my 91/30 and m44, although very dirty. I ordered a case from tradex hoping it would be the same stuff, it's 71/68 and have yet to fire it, and has no visible sealant. Does anyone know where I can buy more 61/67?