Direct Chamber Loading - MP-Pistol Forum

Direct Chamber Loading

This is a discussion on Direct Chamber Loading within the MP Reference forums, part of the Smith & Wesson MP Forum category; All, I use my M&P 9c for dry fire practice nearly every night. As a result, the chambered round gets ejected and set aside for ...


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Old January 17th, 2012, 10:21 AM   #1
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All,



I use my M&P 9c for dry fire practice nearly every night. As a result, the chambered round gets ejected and set aside for use at the range. I do this to avoid any potential bullet setback that could result from repeated rechambering of a round.



In an effort to be cheap, I'd like to know if it's OK to directly chamber a round in the M&P 9c. By "direct chambering" I mean placing a cartridge into the chamber while the gun is out of battery in slide-lock, easing the slide onto the cartridge, and tapping the rear of the slide to "pop" the extractor over the lip of the casing.



The extractor on my 9c is spring-loaded and it doesn't seem like direct chambering could damage the extractor, but I'd rather be safe than sorry. Thanks in advance for any replies.
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Old January 17th, 2012, 01:32 PM   #2
 
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Is it that this is your carry gun and you are extracting a live chambered round prior to a dry fire practice? Just want to be sure we aren't practicing indoors with live ammo. For your neighbors sake.
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Old January 17th, 2012, 01:37 PM   #3
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I wouldn't. In any semi auto pistol, the extractor is designed to have the case slide under it as it strips the round from the magazine and guides it to the chamber, not to be forced over the case when the slide is closed on a pre-chambered round. Let the gun work like its supposed to; everyone will be happier that way.



What is your carry ammo? If it's a +P or +P+ loading, I can understand being especially conscious of bullet setback, and the greater pressures they generate, but more often than not, that won't become an issue until the bullet has moves a goodly distance rearward. Just chambering a round once isn't going to overpressure your ammo.



How I combat bullet setback is to take an Ultra Fine tip Sharpie marker and draw a line around the bullet where it meets the case; when that line is no longer visible, I know the bullet has been setback a fair amount, and I remove and replace it with a fresh round.
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Old January 17th, 2012, 01:53 PM   #4
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I dry fire my EDC full size M&P357 a lot when I'm home, I sometimes directly chamber a round when I'm done. I have not broken the extractor yet, but I figure if or when I break it I'll order an Apex Tactical FRE. I do have a spare extractor should I break the one in the firearm so I don't have to wait on an FRE. I don't recall the manual saying not to do so but I could be wrong.
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Old January 17th, 2012, 02:10 PM   #5
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This was a well known no-no with 1911's because the extractor on the classic 1911 is one long leaf spring and direct chambering bent it beyond it's designed flexure.



I'm not sure about the spring-loaded pivoting extractors. They're surely designed to pivot far enough, but the geometry on the front surface of the extractor may not be conducive to camming over the cartridge rim. I'd be concerned about the rim getting deformed and breaking on extraction, leaving you with an empty case stuck in the chamber and no quick way to remove it. On the other hand, so much "conventional wisdom" is flat-out wrong, like dry firing without snap caps or magazine spring taking a "set" if they're left loaded.



I don't do it on mine because of the aforementioned reason. But if you've done it with no bad effect, and you're not using the gun for self-defense, keep doing it and report back.
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Old January 19th, 2012, 12:18 PM   #6
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Quote:
Originally Posted by Tiprip View Post
I don't do it on mine because of the aforementioned reason. But if you've done it with no bad effect, and you're not using the gun for self-defense, keep doing it and report back.


I EDC my 9c, but the 9fs pretty much stays in the safe for HD. If I try it with the 9fs, what should I look for? Extractor wear? Dinged/dented cases?
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Old January 19th, 2012, 10:07 PM   #7
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We've probably done it at least 2000 times loading just one of our M&P pistols, without any ill effects. I'm sure it causes some additional wear, but it hasn't caused any damage as far as I can tell. I find that our Aluminium snap caps wear fairly quickly when you load them this way, but a few of them may have been "direct chambered" 500 times or more, which is a lot to ask of aluminium.
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Old March 21st, 2012, 06:55 AM   #8
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I've loaded a round into the chamber with the slide open many times to achieve my "+1" rounds for carry duties. I've never had any issues.



I will say though that if I attempt to do this on my UBER FUSSY Taurus TCP .380 that any chamber loaded round will always fail to eject when I fire the gun. However if I load the chamber by peeling a round off the top of the mag, then reload that missing round in the mag, I never have issues with ejecting. Weird! I would think that a chambered round is a chambered round, but I guess not with that PITA little gun.
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Old June 1st, 2012, 05:41 PM   #9
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Call smith see what they say
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Old June 2nd, 2012, 10:44 AM   #10
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Unless you're reloading the same round over and over, not rotating your carry ammo, I'm guessing no damage is done at ALL to the extractor, and negligible damage to the rim.



I do it all the time.
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Old December 27th, 2013, 08:40 PM   #11
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Quote:
Originally Posted by Tiprip View Post
This was a well known no-no with 1911's because the extractor on the classic 1911 is one long leaf spring and direct chambering bent it beyond it's designed flexure.

...

On the other hand, so much "conventional wisdom" is flat-out wrong, like dry firing without snap caps or magazine spring taking a "set" if they're left loaded.
It's amazing how things pass into the realm of "conventional wisdom", even if the idea no longer applies. Just because the 1911 would break in a dozen different ways if you looked at it funny, doesn't mean that those old rules apply to a modern pistol.

I've had people vehemently tell me that popping a round directly into the chamber and closing the slide was going to destroy my gun. I've done it hundreds if not thousands of times without any ill effect.

Last edited by eXceLon; December 27th, 2013 at 08:43 PM.
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Old December 28th, 2013, 11:36 AM   #12
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If people really do worry about this stuff, there is another option. You can place the bullet under the extractor claw and then slowly move the slide forward into battery. The process is easy and quick, but you should test it with your gun at the range to make sure everything still works fine.

1. Lock the slide to the rear.
2. Hold the gun vertically with the muzzle pointing up.
3. Set the bullet on the breechface.
4. Push the bullet (push towards the bottom) until the round slides under the extractor and hits the ejector. Once it's under the extractor, it'll stay in place.
5. Grasp the rear of the slide and begin to slowly move it forward while pushing the bullet downward. Once the round moves in front of the ejector, it will go right into position and into the chamber.
6. Push the slide fully into battery and do a press check to make sure everything's correct.

That, or just keep slamming the rounds home. I've never had any issues with slamming the same round home over and over, but that's just me.
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Old December 28th, 2013, 07:08 PM   #13
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I direct chamber to avoid setback in my carry ammo. I haven't had a problem either.
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Old December 29th, 2013, 10:04 AM   #14
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It hasn't hurt mine, and I did it a lot before everyone started telling me that the gun would self-destruct if I did it.

I still do it (I figure that the only part to wear might be the extractor, but then I'd have a reason to buy an APEX extractor -- so far I've resisted. Maybe I should buy one now just to have it on hand......
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Old December 29th, 2013, 10:54 AM   #15
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The 1911 is a contained extractor, meaning it projects from within the slide, and would put undue stress on it causing them to break or be tweaked causing issues. On the M&P the extractor is external and spring operated. Direct chambering will not harm it unless you do it an extreme amount. Very remote if properly heat treated and the spring is working properly.

As far as setback just rotate the rounds in the mag. I do not worry about setback of a round unless it is a visible difference. Minor differences in OAL aren't a real issue. Any experienced reloader has seen variations. Just caliper factory ammo and you will see it isn't all the same.
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