I have come close to doing the same thing when taking a .40 and a 9mm to the range at the same time.
Now I take a .45 and a .40 or a .45 and a 9mm. Makes life easier.
I would think it would be very easy to do when taking 1911s to the range chambered in multiple calibers.
You can't be too careful. I was at the indoor range a year or so ago and a lady came in to rent a gun to get ready for her department qualification.
I am guessing she did not shoot much at all. Anyway she rented a .40 and the salesman at the counter gave her a box of 9mm.
She was having a terrible time getting the gun to function. Can't imagine why.
She was in the lane next to me and finally I asked to see the gun and the ammo and sent her back to the salesman to get it corrected.
They are all around us
