I would go with either Sellier and Bellot or PRVI, new not surplus. The brass is reloadable and if you are shooting a SMLE or P-14 Enfield you may wish to consider a neck sizing die rather than a full length sizer. I believe that for surplus you can find some at J&G Sales, Global, SAMCO and the like but check our sponsors list for surplus deals. ABout the best surplus I have shot in a long time is the Greek Surplus - necks are annealed and it is reloadable. With some surplus you get a lot of variation in consistency of ignition and accuracy, not to mention older corrosive primers. HTH.