Thread: Why do .22s have such different accuracy with different ammunition?

I was watching a vid last night kinda on this topic . This guy shoots a custom vuuduu (not sure on spelling) in competition and pointed out the variation even within the same batch and said pretty much the same thing as uk exile mentioned above . His also put it down to the primer ring being inconsistent in thickness and measures every bullets primer thickness and only uses the ones all with the same measurement as that can be enough for surprisingly large performance/accuracy changes. (His words not mine)