I would not load for anyone.
Even if I measure every charge and leave a margin of error I also know my reloads would get the blame for some unrelated problem.
Barrel obstruction leads to kaboom? Assumed reloads. Bug crawls in, or there is lint, dust, etc? Reloads get the blame.
Fires out of battery resulting in damage? Reloads will be assumed to blame.
Really reloads will be presumed the most likely problem, because they are, even when they are not responsible, and even without liability concerns that is just asking to hurt a relationship.
Then when you get into liability it becomes unworth it from a financial standpoint.
As others have said you can explain it and have someone else load with your stuff. Then it is on them. However if they are unexperienced they are even more likely to eventually make a mistake, especially if they start cranking out rounds. It only takes one.
While selling them requires a license. You could probably charge for cost or components, but how it was done would need to be very specific so it was not a gray area.
It is unfortunate there is so many negatives because it is such a neat thing that would certainly be appreciated. It just really is not worth it and advised against.
Now if it is done under the Clubs liability and covered by thier insurance then that can change everything.