CHAPTER XXI.
ON RIFLING GUNS 183 Importance of Rifling 183 U. S. Rifling Machines 184 Old Fashioned Rifling Machines 186 Gain Twist Rifling Machines 188 Re-rifling 188
ON RIFLING GUNS 183 Importance of Rifling 183 U. S. Rifling Machines 184 Old Fashioned Rifling Machines 186 Gain Twist Rifling Machines 188 Re-rifling 188