In Australia we have full on "Razorbacks" Feral Boars of huge proportions check out some of the photos on our bowhunting sites these animals are ferocious and irrespective it is all about shot placement with whatever you use! My 30 / 30 Winchester with 170gr RN Sierra's will put them down pretty swiftly, but you've got to get em in the boiler room! Bowhunting boars is very challenging, however it is also very common in Australia, just as many record Pigs have been taken with bows as well as with rifles down here.