9mm or 40cal

[Zorgnot]

I've got guns in both calibers. IMO if you're limited on 10 rounds, you might as well make the biggest hole you can.

But if you want to shoot a ton, 9mm is tough to beat.

My 2 cents

[enzo357]

I have a glock 35. Planning on buying a 9mm kkm conversion barrel. Cost is the factor with me.

[bonzaiii]

If your just going to get 1 I'd say a 9mm, yo9u'll be able to afford to do much more shooting.

[RedFord150]

Both are good calibers. As others have said, 9mm is cheaper and has less recoil. You should shoot both and decide how comfortable you are with either one.
If you must depend on it for your life, shot placement is more important than 'knockdown power'. If you miss, the caliber is irrelevant.
BTW, I do not own either anymore. My semi-autos are .45acp and .380. I have previously owned and sold 9mm and .40S&W. I will take the .45 over both and the .380 if I want something small.

[famas619]

I can shoot better with the 9mm. I had a .40 but sold it. Every time someone tells me that 9mm sucks i ask them to volunteer to be my target since 9mm wont do s**t, and they always decline. Nothing wrong with any other calibers, 9mm is just what i can get on target the most.