Brawl in Cell Block 99 (Vince Vaughn) was interesting. If you liked Shot Caller check it out on Amazon (some of the bashed in prosthetics heads could have used some work though lol).
I thought it was a misfire - though did do some interesting things. I highly recommend the director's other feature (at least the one I saw) 'Bone Tomahawk.' A lot of great thing about that movie but my favorite is the absolutely incredible performance of the 'town drunk' character. He took a normal western throwaway role and made it the core of the movie.