Improvised ammo for the zombie apocalypse

One of the first things to go in the zombie a apocalypse is ammo, specifically- shotgun ammo.
most people, how ever- tend to only take the 00 buckshot and slugs, leaving behind the bird-shot and lighter buckshot, while yes, No. 3 buck will kill zombies dead, its effective range is significantly shorter then a slug, So- the following is a list of improvisations to help you live throught the zombie apocolypse...

1- Cut shells, ringed shells or cut slugs.
Manufacture:

Pros: only a knife is needed for manufacture, massive impact.
Cons: cannot feed in magazines. cannot reload used ammo.

2: Tape shells

Pros: massive impact, can feed in magazines, can reload shells.
Cons: requires fore thought, uses expendable, non-replacable resources.

3: Wax slugs


Pros: massive impact, can feed in magazines, can reload shells, if made with bees wax- uses all renewable resources
Cons: requires fore thought.

4: home cast slugs,


Pros: can feed in magazines, can reload shells, flesh rending impact, highly accurate.
Cons: requires fore thought, requires special tooling, requires time.

5: other, (captain Ahrab, .69 cal musket ball, Ahrab brennike. also some others and some previously discussed slugs)


Pros: various,
Cons: various,

Point B range, aftermath shots: