My 22 cents worth on the availability of .22lr ammunition in 2015 and 2016.
LCR 22 Chapter 2
How many 22lrs will it take to puncture a propane tank?
5 REASONS WHY YOU CAN'T FIND .22LR AMMO
Will a 22lr go through 100 balloons?
Top 10 22lr Concealed Carry Pistols