From left to right, looks like a .22, but the case measures just over .20, U headstamp
The second has a “bullet” of .013. Next to it is a fired case. I have several of those. and they all have the firing pin mark in the center.
The next one is a .22 necked down to about .15, U headstamp
The next one makes it look like someone was playing with a primer marked WRACO new No 4
The last one is a .22 for scale.