So, there's a few places in AoE where treasure is given in the form of pre-filled Spellstrike Ammunition. Except that it seems to be impossible, given that activated ammo needs to be activated on the turn its used. My assumption is the adventure's writers misunderstood the rules (or the rule writers mistakenly put "activated" in the ammo and haven't fixed it yet).
Is there any good ideas on how to replace these? In particular, there's a few creatures (Diobel Sweepers, Bloody Berleth) who use these in combat, and I don't know if running the combat with them as mundane arrows would nerf them. Should I allow them to be used like the book implies, or should I swap them out with something?
I personally changed how those ammunitions works in my table. Actually because of those treasures.
The following is homebrew.
The magical ammunition is usually bought empty, and can be filled by anyone, even NPCs (the cost is equal to the spellcasting services prices). To use the ammo, you have to use one action to activate it. After that, you have up until the end of your turn to fire it. Otherwise, the ammunition dispels it's content in an unwarmful way.