10,75x73 is a good number especially with Woodleigh tipped RWS 22gm Vollmantel load.

Right off hand I can't think of better blend of knock down power and relatively low recoil in a bolt gun. I might be wrong

because Mr. Zbigniew shot couple of tuskers with 11,60x76 with excellent results. He claims 25% less recoil then .458Lott with better accuracy to boot.
PS. There is this chap slightly older then I named Paul at G&H in NJ. Anybody who is willing to listen my my gun rants for longer then 5min is bound to be gem of a guy and he is.

My satisfaction with that outfit is 100%.