I've had 2 smiths (local) tell me that the Reloader series of powders are very, very hard on barrels.
Had one just last week, when I was talking to him about a build I'm planning, that if I'm just going to run a 6x scope, a custom barrel would be a waste of time.
Most have always tried to talk me into longer, and heavier barrels. And custom throating seems to be a myth.
