Copper fouling is detrimental to accuracy, and a pain to scrub out of your bore.
Leading is detrimental to accuracy, and a pain to scrub out of your bore.
Proper maintenance and attention to proper load data negates the problems with lead. Avoiding copper fouling is nearly impossible (but proper maintenance prevents accuracy from suffering).
For punching holes in paper, lead is fine.
Do a little research on how to choose the properly-sized lead bullet for your bore, and the velocity at which you can shoot certain hardnesses. It will be extremely beneficial. This site has a fair amount of information available, as well as castboolits.gunloads.com.
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."