Here is a link that might help:
Note the picture comparison (driving band width & square base).

http://www.handloads.com/articles/default.asp?id=11

Haven't ordered for awhile, still got 4 boxes, and did not check to see if still avaiable.

Edit: The 7.5 Unique load Sonny123 above mentioned works in my 3 inch Smith.

Last edited by slopshot; 05/25/10.