buy the WWB value pack from Walmart. I've never had any problems with in any of my 9mm's that I have owned.[/QUOTE
Since you're new to handgun ammo, I'll clarify that the WWB in the post quoted above mean Winchester White Box. You may also hear WWB referred to as "Q Loads" since Winchester target ammo stock numbers start with Q followed by numerals. I think the WWB he's refering to is the 115 gr. FMJ (Full Metal Jacket) that wally world sells for about $12 in a 100 round value pack. This is a traditional "target" load; it's not a premium defense round, just a low cost way to shoot. I agree with poortrader, my Hi-Power loves it. WWB is also available in JHPs (Jacketed Hollow Points), but you'd be better served to buy a premium hollow point for self defense.
As for the "other" 9mms out there here's a quick reference for ya;
9x19 AKA regular 9mm, 9mm Luger, 9mm Parabellum
9x18 AKA 9mm Makarov, 9mm Russian
9x17 AKA .380 ACP, 9mm Corto (Spain), 9mm Kurtz often abbreviated 9mm K (Germany), 9mm Browning Short (USA & Belgium).
9x23 AKA 9mm Largo or 9mm Bergman-Beyard; this is mostly seen in Spanish Pistols.
Additionally the .38 Super Auto, 38 Special, and 357 Magnum are 9mm in diameter. The 357 SIG cartridge is a 40 S&W case bottlenecked to hold a 9mm bullet. There is also a 9x21 round that is very much like the 9x19 but is used in many European countries where civillians cannot own pistols in 9x19 since it's a "Military Caliber" making them illegal for civillian possesion. So in a country like Italy you can have a 357 Magnum revolver but not a 9x19mm pistol; you have to get the identical pistol chambered in 9x21 to beat the rules.
Probably more info than you wanted, but it's pretty amazing how many rounds are 9mm in diameter.
