I know why i tried Benchmark in my .338 Federal: most manuals recommend it for all bullet weights in .338 Fed.
I tried it with 180, 200, and 215 grain bullets from 4 companies, two brands of primers, and two brands of cases (and several seating depths. What a pitiful waste of time, components, and gasoline. I even got depressed thinking that my super rifle went south.
Well, as soon as i switched to RL 15, the bullets (200 grain) went into a 0.5" hole.