Originally Posted by T. R. Graham
No sir. The barrel is harder than the MGSL. In fact, the MGSL "wears-in" to the barrel with firing. Barrel Rockwell C hardness runs 63-67 RC, MGSL hardness runs 32-34 RC.
A factory can be up to 67 on the C scale? That sounds awful hard to me. I would think low to mid 40's.