I found an article on Grant Cunningham's blog by Ed Harris that talks about the .32 ACP:
http://www.grantcunningham.com/blog_files/ed_harris_32ACP.html
Wikipedia lists the bullet diameter of .32 ACP as .3125 but a lot of bullet manufacturers make the .32 ACP bullets smaller - .311" down to .307"
http://www.grantcunningham.com/blog_files/ed_harris_32ACP.html
Wikipedia lists the bullet diameter of .32 ACP as .3125 but a lot of bullet manufacturers make the .32 ACP bullets smaller - .311" down to .307"