Raise your hand if the outcome here was different than what you expected.
This is a brilliant idea, by the way, and also no pun intended*. You may recall that Fiocci makes tracers for shotguns but good luck finding them right now. Your best shot, again, no pun intended**, is to roll your own.
What you need is a shell press and some tracers. I don’t think anyone makes a .22 LR bullet puller outside of just, you know, pliers, but be careful with the case rims. You might want to neutralize the primer and powder by soaking them in oil but I don’t know if that will affect the tracer tips.
So yeah, bone up on your reloading skills and get ready to make your own shotgun tracers.
*That is a lie.
**Seriously, if it was unintended, why wouldn’t I just re-write the sentences?