boron

  1. zfk55

    Hexagonal Boron Nitride and the SMK 175

    We're about to begin a process on Sierra M/K 175 projectiles, and we're going to use Hexagonal Boron Nitride. After a number of correspondences with the maker of the rifle, he's agreed that HBN is superior to Moly in that HBN doesn't have the eventual adverse effects on the bore inherent in...