Here's the exercises in the "test:"
“300”
25x Pull-up +
50x Deadlift @ 135# +
50x Push-up +
50x Box Jump @ 24” box +
50x Floor Wiper @ 135# (one-count) +
50x KB Clean and Press @ 36# (KB must touch floor between reps) +
25x Pull-up
300 reps total
Taken from this article:
He does say that it was simply a test or challenge for the actors to complete and said only about 50% of them did. The actually training they did involved varying and grueling workouts 8-10 hours per day, 5 days per week for 4 months. If you haven't seen the movie it is absolutely bad ass!
This page has some of the guys transformations:
I like Mr. Jones theory about "short-stroked" reps and ROM. Always makes me cringe when I see people doing that crap.