An estimated ten yards at the outset, and the lion was sorta approaching "sideways"? I'm not at all surprised that #8 did the number on that lion.
At some 25 yards, a load of #9 Skeet had doctors removing over 60 pellets from a buddy of mine--as deep in as his liver. Inside of ten yards with regular-load #8? Ruinacious.
You're from BATFE? Come right in! I use all your fine products!