I've used both on large game for a number of years . On large game ( Moose , Elk , Grizzly ) , the 45/70 has a distinct advantage . That being said , the 30/30 has been , and still is , used on these animals regularly . If I were hunting in the UK for any deer species within 200 yards , I would happily use a 30/30 and not look back . It does have the advantage of lighter recoil and less cost to feed . This will encourage more time shooting the rifle , always a good thing . I prefer a 45/70 , mostly because I regularly run into large , and potentially dangerous , animals . I don't consider Black Bears as large game , but they can be dangerous . They are taken regularly with 30/30 chambered rifles . If they can cleanly kill a 400 pound Bear , I would say that they're capable of taking Boar . I would stick to heavier , or sturdier , bullets though . If you intend to scope whatever rifle you choose , I'd go with a Marlin or Henry lever , they're far easier to scope , other than the Winchester 94AE . I've always preferred Marlins because of this , and the fact that you can pull the bolt after removing one screw , the lever pivot screw , so you can clean the barrel from the breech end . The Winchester designs don't allow for this . Let us know what you decide on .
AB