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How can it not be safe pointing an unloaded gun at someone(doing this)

The guns unloaded, both people know it you have been asked to do it. Its alot different to just randomly pointing guns at people.

I honestly don't see why its bad, I get the whole don't point guns at people but its unloaded both people know that and its to benefit your shooting. You have been asked to do it, it's a whole other...

If the guns unloaded and he wants you too so he can check the fit, then fair enough. If that's how you check the fit or not is another question.