This address my only real concern about leverguns, safe administrative unloading. I know if your careful you can just cycle them through the gun but have never cared for that technique, especially on original guns or modern ones without a safety.
I read some forum posts about people that claim to be able to unload levergun mag tube same way you would a shotguns mag tube but I've never been able to do that personally.
This youtube demonstrates an easy way, just lay rifle on side with loading gate up.
One hand fully depresses loading gate.
Other hand uses small wooden dowel or similar tool to lever case rim above loading gate.
Youtube demonstrating it as Second method of unloading titled "Two Ways of Unloading Your Lever Gun" by Peepaw McDonald
https://www.youtube.com/watch?v=wMI7r6AM6EA