Rechambering the same round
- Thread starter DeepSouth
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I am trying to imagine what the force would be pushing the bullet back into the case.... there shouldnt be one if your gun is feeding correctly... the round is pushed from the mag into the chamber while only sliding up the feeding ramp (depending on the gun) at which point in that process is the bullet being pushed against something with enough force to push it back into the case?
but hey... I could be wrong....
but hey... I could be wrong....
rcmodel
Member in memoriam
Lots of guns hit the feed ramp hard enough to put dents in lead bullet noses.
Heck, Colt Commanders hit the feed ramp hard enough to put dents in the feed ramp!
And not all ammo is created equal.
It has been known for factory ammo to not have enough neck tension to hold the bullets in place.
rc
Heck, Colt Commanders hit the feed ramp hard enough to put dents in the feed ramp!
And not all ammo is created equal.
It has been known for factory ammo to not have enough neck tension to hold the bullets in place.
rc
dfariswheel
Member
- Joined
- Dec 26, 2002
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- 6,657
Bullets do set back into the case from impact on the feed ramp.
The big danger is not so much over-pressure problems but failures to feed.
This was discovered in the early days of the police move to the automatic pistol.
There was a sudden rash of second round failures to feed in police guns.
The cop would fire the first round and the second round would fail to feed, causing a stoppage.
This was traced to bullet set back caused by the daily inspection process where the same two rounds were getting chambered over and over.
The shorter overall length was causing the feed failures.
Todays police ammo is usually factory rated for 3 to 4 chambering before it needs to be fired in practice or discarded.
How much set back you get depends on the ammunition and the gun. Some guns are worse than others, and some commercial "civilian" ammo isn't rated for multiple chambering.
The big danger is not so much over-pressure problems but failures to feed.
This was discovered in the early days of the police move to the automatic pistol.
There was a sudden rash of second round failures to feed in police guns.
The cop would fire the first round and the second round would fail to feed, causing a stoppage.
This was traced to bullet set back caused by the daily inspection process where the same two rounds were getting chambered over and over.
The shorter overall length was causing the feed failures.
Todays police ammo is usually factory rated for 3 to 4 chambering before it needs to be fired in practice or discarded.
How much set back you get depends on the ammunition and the gun. Some guns are worse than others, and some commercial "civilian" ammo isn't rated for multiple chambering.
NavyLCDR
member
Depending on the gun...
You would less likely damage the extractor by dropping the round in the chamber manually, then closing the slide over the chambered round. That way the round you are rechambering will never suffer setback of the bullet. It's also easier to load a full mag +1 in the chamber this way.
I KNOW, I KNOW, there are many many internet experts out there that will tell you not to do this, but my gun, Taurus Millenium Pro .45 has no problems at all with this. I would say it is NO problem with a gun that has a spring that holds tension on the extractor, it MIGHT be a problem with a gun that just uses the flex on the extractor to maintain tension.
This is what I do:
Drop the round in the chamber.
Ride the slide forward by hand with just enough force for the extractor to engage the round.
Do a brass check - pull the slide back enough to observe proper partial extraction of the round from the chamber.
Push the slide forward, ensuring it goes into full battery by observing that the back of the slide is even with the top of the frame.
Insert full magazine.
I have had ZERO problems with this procedure after performing it hundreds of times.
You would less likely damage the extractor by dropping the round in the chamber manually, then closing the slide over the chambered round. That way the round you are rechambering will never suffer setback of the bullet. It's also easier to load a full mag +1 in the chamber this way.
I KNOW, I KNOW, there are many many internet experts out there that will tell you not to do this, but my gun, Taurus Millenium Pro .45 has no problems at all with this. I would say it is NO problem with a gun that has a spring that holds tension on the extractor, it MIGHT be a problem with a gun that just uses the flex on the extractor to maintain tension.
This is what I do:
Drop the round in the chamber.
Ride the slide forward by hand with just enough force for the extractor to engage the round.
Do a brass check - pull the slide back enough to observe proper partial extraction of the round from the chamber.
Push the slide forward, ensuring it goes into full battery by observing that the back of the slide is even with the top of the frame.
Insert full magazine.
I have had ZERO problems with this procedure after performing it hundreds of times.
My tactic to prevent "setbacks"...
When I have to unload my SD round from the chamber (because I will be using practice rounds for training)... I set that SD round on separate pile. If I practice out in the range once a week, that equals to 4 hollowpoints SD rounds set aside per month. In about two months, I have a full mag's worth of SD rounds...which I then use up on the range. Every now and then, I want to fire a full mag's worth of SD round...just to make sure the gun is continuing to be reliable with hollowpoints.
On a daily basis, keep you primary carry gun loaded. No need to unload it when you get home. (Why would you? Right?) The only time you would really need to unload would be to go to the range (so that you can load your practice rounds).
When I have to unload my SD round from the chamber (because I will be using practice rounds for training)... I set that SD round on separate pile. If I practice out in the range once a week, that equals to 4 hollowpoints SD rounds set aside per month. In about two months, I have a full mag's worth of SD rounds...which I then use up on the range. Every now and then, I want to fire a full mag's worth of SD round...just to make sure the gun is continuing to be reliable with hollowpoints.
On a daily basis, keep you primary carry gun loaded. No need to unload it when you get home. (Why would you? Right?) The only time you would really need to unload would be to go to the range (so that you can load your practice rounds).
cougar1717
Member
If I had to deal with this (and wasn't a reloader), I would measure about 20 cartridges with a caliper just to see what the range of cartridge length was and continue to measure the loaded round each time. This gives you an approximation of what the shortest factory cartridge should be. Without a caliper, that marker trick is a great idea.
Concerning loading and reloading magazines, I would try to do this as little as possible, especially with double stack mags. I used to unload and reload a magazine pretty regularly and then switch mags and do the same thing. All that did was weaken both springs enough that the last cartridge wouldn't feed from either magazine, but I didn't realize this until I went to the range and shot it.
Concerning loading and reloading magazines, I would try to do this as little as possible, especially with double stack mags. I used to unload and reload a magazine pretty regularly and then switch mags and do the same thing. All that did was weaken both springs enough that the last cartridge wouldn't feed from either magazine, but I didn't realize this until I went to the range and shot it.
1SOW
Member
Setback could be a problem in high pressure rounds like 9mm and .357Sig (+ others).
RC: Useful technique! Thanks
RC: Useful technique! Thanks
I try to avoid unloading/reloading my carry gun to prevent set-back. I also fire my carry ammo and reload with fresh ammo when my carry guns go to the range with me.
If you're concerned about set-back, but need to unload/re-chamber the same round over and over again, you might want to invest in a decent digital caliper. That way, you can check the OAL of your chambered round when you remove it from your weapon and discard it when you notice set-back.
If you're concerned about set-back, but need to unload/re-chamber the same round over and over again, you might want to invest in a decent digital caliper. That way, you can check the OAL of your chambered round when you remove it from your weapon and discard it when you notice set-back.
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