Well, bullets might move between routers, so they might change the Layer-2 network they are on, and thus might need their own independently routable address. Afaik it is bad practice to route anything smaller than a /64.

I have both a /29 and a /32 of v6 space, and unless my ASN achieves total global domination on a scale never before seen by humankind, it should last a good long time. :-)