22 LR shooters should look at this video.

As much as I do think consistent thickness can improve some consistency. IMHO the inexpensive ammo will have such wide varying powder, primer charges and bullet dia. and weight to have more impact on your groups.
Also consider what your 22 platform is getting for groups to begin with.

http://www.nielsonbrothersarms.com/22 Concentricity.htm more stuff you might not know and might not need to know

http://www.nielsonbrothersarms.com/22 Concentricity.htm

After you sort rim thickness you can "resize" your 22 also

http://www.portercalls.com/neal_waltz_die.htm

 
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