Potentially yes. Wild boar are very large tough animals. Their chest cavity is well protected by a thick plate of cartilage, muscle and fat, which usually requires a deep penetrating bullet to humanely control mature specimens. Wounded animals can become very aggressive and attack the hunter or worse escape and attack people out in the countryside.
Therefore the suggested minimum calibre which is accepted by most police forces is .270 and 130 grain bullet and a minimum muzzle energy of 2600ft/lbs.
This should be regarded as the absolute minimum and larger calibre rifles should be used if possible. The 9.3 calibre rounds are very popular on the continent and are well proven for wild boar. It could be argued that .375 and larger calibres should also be allowed for wild boar.
12 bore or larger shotguns using only a single projectile (rifled slug) can also be suitable for wild boar in certain conditions.