Ammo For Sale

« « Hope and change | Home | In FL » »

Rob Pincus reads the gun blogs

And he and I agree on something: we prefer 9mm to 40.

As some smart guy said once (from memory, cannot find the post): 30% more cost and recoil for 10% more performance.

22 Responses to “Rob Pincus reads the gun blogs”

  1. Matt Says:

    The St Paul Police (where I live) recently made the change from .40 Glocks to 9mm Glocks or M&Ps.

    I know I shoot a nine better than a 40, and I think they found out that’s true for their officers, as well as giving up next to nothing on wound ballistics with today’s ammo.

    St Paul

  2. Rob Pincus Says:

    Yes, I do… sometimes.

    I appreciate you posting a link to the Article!


  3. CaptainVictory Says:

    I have to say, I’m pretty tired of people (some of whom don’t own a gun) telling me my M9 won’t take down an intruder. Funny, when I ask them to participate in a little experiment, they laugh and go away.

  4. wizardpc Says:

    I think just about everyone has realized this. At the last few gun shows i’ve been to, attendees have been trying to offload .40’s to switch to 9mm. I distinctly remember a few months ago that everyone I ran in to with a Glock for sale were selling G23s.

  5. Sebastiano Who Loves Darwin Says:

    It’s probably more a function of ammo costs than anything else, Wiz.

  6. Dann in Ohio Says:

    Another overlooked factor in fire-power when debating the 9mm vs the .40S&W or the .45ACP is magazine capacity.

    I will readily admit that if you compare two full-size or two compact size guns… the 40S&W has more “fire-power”/energy/etc. than the 9mm on a per cartridge basis… but how about the firepower of a magazine before reloading…

    Considering that studies of police shootings show an average of about 30% of rounds fired hitting their intended targets and about 55% of civilian shootings rounds doing the same… I’ll take my chances with 20 rounds of 9mm over 14 rounds of 40S&W or 9 rounds of .45ACP

    As I tell my NRA/CCW students in Ohio, a .22LR hitting target is better than a .45ACP missing the target – yes, recoil and being able to control the firearm are critical considerations… and no… I’m not advocating for .22LR as a defensive round… but Rule #1 of Gunfighting: Have a gun!

    Dann in Ohio

  7. HL Says:

    I can’t even mention .40 Cal around Drake. He scoffs, mumbles something about “Forty Short and Weak”, then pulls 4 bubbles from the whisky bottle.

  8. Weer'd Beard Says:

    Really the energy differences between 9×19 and .45 is nothing more than Academic, and .40 S&W is between those two. Meanwhile I have shot similar guns in all three calibers and the .40 Has the sharpest recoil and the most muzzle flip.

    9×19 is probably the best defensive handgun caliber out there…tho I’m a fan of the heavier bullets of .45 personally.

  9. Bubblehead Les Says:

    Another factor: Lots of Single Stack 9mms for sale in the last couple of years for CCW use like the Ruger LC9. How many Single Stack .40 S+Ws are on the Market? Personally, my next Upgrade is going to a 9mm.

  10. Tam Says:

    I carried a .40 G23 from ’93 to… ’01? Used to spout Marshall & Sanow’s OSS numbers like they were some kind of gospel, too.

    I think I sold my last .40 in ’04. Haven’t missed ’em a bit.

    Anybody who maintains that there’s any real difference in the performance of service-grade JHPs in any of the service calibers (apart from some barrier issues; auto body/glass stuff…) hasn’t been keeping up with the data.

  11. Sebastiano Who Loves Darwin Says:

    I don’t think you’d wanna get shot with any one of them, but if I’m an LEO stopping a bad guy at night and he shoots at me as I approach the car and I have to return fire through glass, that auto body/glass stuff probably becomes really important really quickly, and is reason enough alone to be glad your dept dumped the 9mm.

    Am I more accurate with 9mm? Maybe marginally so. But on a man sized target at common engagement ranges? Not enough to make a difference, and if I am hitting the target I can’t see any reason to not take the harder hitting round.

  12. Paul Says:

    Just do most of your practice with a .22 version and a 9mm, then shoot the .40 now and then.

    That way you reduce your cost and still get a bit more power in the carry gun.

    And of course, reload and stop buying all that very expensive factory stuff.

  13. Jim Says:

    As a rank amateur always striving for improvement I have decided the 9mm is “my round” after trying a friend’s 40’s and 45’s and deciding there was too much recoil for me to effectively control. I know it’s not considered manly to fess up to that but my primary consideration is effective rounds downrange. My XDm is ideal for me. I enjoy shooting other calibers up and down but the 9mm is my carry round.

  14. Texas Jack 1940 Says:

    “Your purpose is not to kill the bad guy, it’s to stop the threat. Target center of mass and shoot until he goes down, then stop.”
    “Nothing says intent to kill like a head shot, except maybe the round or two you fire after he’s down. You do that, you get tried for murder.”

    That’s from my recent CHL renewal class. Note the shoot till he drops. For me that means four to seven rounds of 9mm JHP as quickly as possible, as close to center of mass as possible. I can’t fire a .40 or .45 (or a .357) that fast.

  15. TomcatTCH Says:

    I own .45’s and 9mm’s. Even have some 9mm magnums (357 magnums).

    I like the bigger hole and the extra momentum that .45 provide, which is why I carry it over any of my 9mm’s.

    I always wonder why no one seems to talk about momentum. It’s certainly an issue that bears mentioning. Just watch the difference between shooting steel plates with 9mm and .45.

  16. wizardpc Says:

    Steel plates aren’t likely to attack me while I’m walking the dog.

  17. TomcatTCH Says:


    We don’t get attacked by ballistic gelatin either, yet we sure pay attention to gelatin tests.

    In fact, it’s the primary way we study the terminal effects of modern projectiles, from which we know that modern 9mm, .40, and .45 projectiles tend to penetrate and expand in very similar ways.

    One might say observed data is a handy thing.

  18. mariner Says:

    One might say observed data is a handy thing.


    Them’s just [spit] anecdotes.

  19. North Says:

    Meh. Don’t confuse me with facts. I picked my .40 because I liked it.

  20. Duane Says:

    I remember the discussion from 20 years ago. A coworker was waxing eloquent on his new wonder 9, I told him my .44 Desert Eagle may only hold 8+1 but my total energy budget was significantly higher than his 15+1, and if the Bad Guy was still coming after taking 9 rounds of 240 JHP at 1400fps he could have the damn gun.

    Now days I am quite comfortable with a 9mm loaded with 147gr defensive rounds.

  21. Rob Pincus Says:

    Whatever you carry, you should definitely be practicing with THAT caliber if you want to develop your skill for multiple shot strings of fire. Dry fire, laser trainers, .22 conversions and the like can be good for a lot of things…but you’ve got to train your shooting skills in context.

  22. Gun Blobber Says:

    @TomcatTCH: wizardpc’s reply might have seemed smart-assed, but in reality it is right on the money. A steel plate will not be penetrated (much) by a handgun round; the round partially smashes into it (losing some energy and momentum as the lead deforms), partially bounces off of it in a way that is a bit reminiscent of billiards balls bouncing around a table. In other words, it has some properties of what is known in physics as an elastic collision. The bullet bounces off in some direction, and the steel plate bounces in another direction. The bullet is certainly not absorbed completely into the steel plate.

    A bullet passing through a soft, penetrable substance does not exhibit those same behaviors. The energy is dissipated as the bullet passes through the tissue. In many cases, the bullet remains embedded in the soft substance, creating a perfectly inelastic collision.

    So, in short, human bodies do not transfer or react to momentum in the same way that steel plates do.