[Jim Verdolini]

It's a shot shell and shoots nr 11 shot and it shoots a good bit beyond 25 ft. Still, I am amazed it is effective on squirrels.

[Fido969]

Yeah, I think you're right - the .22 is #11 or #12, and the .45 shell is #9.

I order mine from Sportman's Guide:

http://www.sportsmansguide.com/cb/cb.asp?a=66028