In the recent poll on survival guns,I noted no votes for black powder and a few for air rifles.Personally I think both should be included in your armory.
Modern air rifles,and I am mainly talking those that shoot at 800fps or faster are powerfull enough to take small game at reasonable distances.Ammo is cheap and major supply takes up no space.
If you are trying to maintain stealth,do you really want the report of rifle or shot gun alerting the zombies?
For those who are prepping for all out TEOTWAWKI,with B.P weapon you can make your own powder,cast your own bullets potentially feeding this weapon untill it breaks or you run out of materials.Powder matieral you can make ingredients. Lead,old sinkers,wheel weights,etc.
If you can afford them I think both are worth a look.
wayfaring stranger from cold mountain -
39 minutes ago