TexasCHLforum.com

All of these these calibers are effective. As has been pointed out 9mm is cheapest and you will shoot more. Shot placement is more important than caliber size. Practice regularly with whatever you choose. Renting is a good idea. Don't get spread out with different calibers (find your favorite and stick with it) as it is much more expensive stocking more ammunition. My rule of thumb is to only shoot half of what I buy to maintian a stock for when something hits the fan.