It will damage the face and it may cause other issues depending on the lock. The more important thing is you will learn nothing from bumping a lock. It is like a pick gun. I got a gun 2 months after I started working as locksmith and it was the worse thing that could have happened to me. Well as far as picking goes that is.

I have now gone over 6 years without ever really learning to pick. I can rake a lock open in seconds but that is not the same. I have literally opened thousands of locks at this point including over 60 in one day by raking and gunning but I have learned more in the last week or so by finding this site than I did in 6 years. I can say for sure that I SPP a lock for the first time yesterday (while driving

) and it was more informative than I thought possible.
I got the how and why of picking a long time ago. But getting a lock to go by doing it is a eye opener. Being able to tell another co-worker which pins pick first and last and having him confirm it was sweet too. So the message is tough it out and you will advance miles in a short time once you get it. Or go the bump and/or gun route and "goon" open a lock and learn nothing. In my opinion opening a lock and picking it is a bit different if you know what I mean. If you don't learn anything about it you just opened it, and the next time it might take twice as long. On the other hand if you picked it you should know at least which was the last one to go and at best the exact order they went in so the next attempt should be faster.
Jason