Good and bad news. With ammo in short supply using it to train seems problematic. I would suggest hanging on to it if you have your rifle sighted in. A better use of time at the range now would be to find a few friends to train with... imho.
How would sight picture, point of impact compare when shooting an AR with a .22lr insert? If it’s on at 25 yards with .22lr, would it be on with 5.56 at typical 5.56 yardage?
I was going down to sight in an optic.
I never did get that done.
I got swept away with the enthusiasm of the moment and just enjoyed the day outdoors with like minded people.