TexasCHLforum.com

I would just get your auto cleaned up and oiled up (not too much oil!) and not worry about it. Even if everything went wrong that day, I would bet almost anything that if you notified the instructor, one of two things would happen:

1. they would lend you a gun (some have extras)
2. they would allow you to finish with someone else's when they're done

Both of these are more likely to happen if you have ammo of the same caliber, so nobody is out anything by helping you. I think you'll find that pretty much all of your classmates are good people that would be willing to help a guy out, because they know you want your CHL as much as they do.