Seems opinions vary greatly on what is a sensible boar calibre for traditional european style shooting.
Some are very capable of taking clean 1 shot kills with .270, 7x57, etc(similar sizes).
Some feel you need at least a 30 mag or ideally a 9.3 or .375H
I have even read thoughts of 404J on boar.
Is there a general trend perhaps to overgun on boar a bit, yes, it can't be 'too' dead..but too much gun isn't going to give you any benefits in the quality of your shooting due to tiredness in shoulder and arms and/or fear of recoil.
Not looking to stir things up, but would genuinely like to hear peoples thoughts and experiences, especially since the military calibre ban being lifted in France and boar hunters starting to significantly downsize their calibres..that to me begs to be explored a bit further, especially when you look at how effective a .270 with a 150g bullet or a 7x57 with a 175g bullet can be,,then why bother with big heavy hitters if performance isn't really superior/ammo costs/etc.