Brass will conduct better so will have less voltage drop. I have Brass Nemesis Clone, pretty thick walls on it and been holding up pretty good, also got the copper upgraded contact pins, and Loaded Spring (silver plated berilium copper), hits beautifully, better than my SS Nemesis, little less than my Copper Nemesis. So brass is not a bad choice being a balance between the SS and Copper versions, the Loaded Spring and Copper pin upgrades help a lot also.