357 magnum is enough
I have shot a lot of pigs over the years as pest eradication, riding on a motorcycle with a rifle slung over my shoulder(22-250 or 308) & carrying in a cross draw holster either my 38 super colt govt 1911 semiauto, or my S&W 629 44MAG revolver with 8inch barrel. I would mainly use the pistols for close in encounters, or for finishing off wounded boars. I found the 38 super had enough power to consistantly drop boars if hit properly at ranges up to 50 yards. I also like the controlability of the 38 super for quick follow up shots on charging boars, or mobs of pigs. As the 357 magnum has more power than the 38 super you shouldn't have any problems dropping a boar if hit correctly.I found my 44 magnum a bit cumbersome with the long barrel to quick draw, & there is a noticeable recovery time between follow up shots with the 44 magnum.I also find my 44 magnum extremely loud when compared to a 38 super- something you should check with the 454 casul. Although the 44 magnum is a more accurate & powerful handgun than the 38 super, I found that realistically I did not shoot at pigs any further with either pistol- 50 yards or less accounting for 90% of shots, with 75 yards stretching my capabilities of placing a fatal shot with iron sights. If you've always wanted a 454 casul then go buy one- you sure won't be undergunned. There is something satisfying about hunting with a heavy calibre revolver, but for pigs that may be encountered in mobs, or a charging boar - a semi-auto in 38 super gets my vote.