[Fred Fuller]

http://www.guns.com/to-22-or-not-to-22-that-is-the-question-bbtis-killer-22-defense-rounds-test-findings.html
To .22 or not to .22, that is the Question: BBTI’s Killer .22 ‘Defense Rounds’ Test Findings
Article Product & Industry News - 12.21.2011
Story by: Jim Downey
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Some interesting and useful data here IMHO... YMMV.

H/T to http://nwgunsandgear.blogspot.com/2011/12/gunscom-article-to-22-or-not-to-22-that.html for the link.

[Prosser]

Hi
Great stuff. Thanks for posting.

[tubeshooter]

That was indeed great stuff. Thanks very much.