There are actually many structural and other reasons, but I was struck by this post on a topic on loading 284 Win on the American Accurate Shooter Forum.
"I had one barrel that didn't seem to like any of the go-to powders On a whim I tried N160 and found the barrel loved it! I haven't used it since but do have 18 lbs around just in case"


"I had one barrel that didn't seem to like any of the go-to powders On a whim I tried N160 and found the barrel loved it! I haven't used it since but do have 18 lbs around just in case"
typical septic 


