Can a 40 Cal round be shot in a 10 mm pistol safely? ( Mods relocate to better area if necessary)

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  • Bullfrog

    Ultimate Member
    Oct 8, 2009
    15,323
    Carroll County
    EDIT:* Tactical revolver reload.

    When/If the opportunity presents itself, and you find a second to top off the spent rounds. AND sufficient cover to do so…

    With the revolver barrel pointed down…
    1) open the cylinder

    2) push the extractor rod about one half to the rear, pushing the rounds up and part way out of the cylinder.

    3) release the extractor rod,
    • the unfired rounds will drop back into the chambers.
    • the spent cases will still be standing half way out of the chambers, allowing you to pluck them out and discard them.

    4) using the speed strip, reload the now empty chambers.

    5) close the cylinder and get back into the fight with a fully loaded cylinder.

    This really does work well. It was standard instruction when we were issued revolvers.

    Found this.

     

    RoadDawg

    Nos nostraque Deo
    Dec 6, 2010
    94,491
    Found this.


    His comments are a bit off base. It makes no sense to dump live rounds out onto the ground. Then you may have to search for and recover them. Now they are covered with dirt or mud, and it makes things go bad. It’s not like a tactical reload with a pistol, where the rounds are held ready in a magazine you can stow in your pocket or waistband. Discard only the spent casings, and top off so you’re ready.

    He also failed on his reload of four rounds. He did not index properly and loaded 2 - 1 - 1. It should have been 2 - 2 - close cylinder and ready.

    We practiced the tactical reload on the range and most folks were able to do well even when the ROs were doing their best to stress everyone out.

    The reason for it came because of an incident in a western US shooting. A LEO had fired several rounds and was pinned down behind his car. He quickly discarded the spent casings and reloaded. The suspect thought the LEO was out of ammunition, boldly walked up to him to shoot him… but the LEO was able to surprise him with a few more shots.

    So… did I fire five… or was it six rounds?

    If you’re going to carry a revolver… learn the skills to give yourself every edge that you can.
     

    lazarus

    Ultimate Member
    Jun 23, 2015
    13,741
    Yes I have been shooting 40cal out of my 10 mm Glock pistols ( G20sf, G29, G40), using OEM barrel for years now. No issue!

    It’s actually cheaper this way than shooting the normal 10mm practice rounds.

    Recoil out of large frame feels like shooting 9mm, although in the long slide it felt like an eternity for the slide to cycle completely, just like shooting Glock 24.
    My Glock 21L feels like it takes an age of man to cycle on each shot. Especially with a silencer on it. My shorter 9s and 45s feel like they cycle in a small fraction of a second. The 21L feels like you could lay it on the shooting bench to pick your nose before it finishes cycling each shot. Cycle it does though. And it probably is cycling in like 150-200ms. It's just that it cycles slow enough to really be visible for the entire process without just being a blur without recording it with a high-speed camera.

    Just about any semi-auto, so long as the cartridge has the same case and head diameter, extractor groove size and bullet diameter, you can fire it out of a bigger cartridge gun. There are likely some extractor designs or firing pin designs that would not be conducive to this of course. But in general, it is possible and safe. It will cause more extractor wear, but the force of the firing pin or striker hitting isn't that much once transmitted through the case. You'd want to make sure you do not have a worn extractor or extractor spring.

    And a TERRIBLE idea to do for defensive ammunition as it is more likely to lead to a light strike. Lastly, you'll need/want to do more cleaning as it'll leave the chamber dirtier than running full length ammo (just like running 38spc and 44spc in a 357 or 44 magnum does. Also why reloading is nice, because you can just reload 357 and 44 magnum cases to 38spc or 44spc velocities if you want a light round and not worry about the gunk ring from prolonged shorter case use).
     

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