Plus 1 ?

R

RogerThat09

New member
I've noticed that when I load a full clip into my gun, and put one in the chamber than take my clip out to add another round I have a harder time putting the magazine back in the gun. and I've also noticed when I pull the slide back to check for one in the chamber that when I release the slide it doesn't want to go all the way back to the front of the gun as easily, and sometimes I have to push it forward all the way manually. I've noticed this not with one but 2 of my guns. My sig sauer p229 and kimber CDP II ... now for when I don't add one extra round to my magazine after I've loaded it I have no problems stated above. So it became apparent that it had to do with the magazine spring being overloaded, and the top round getting in the way some how because its not wanting to give. At least this is my speculation.
Anyone know anything else about this? Thanks in advance
 
I'm not sure I understand your question. A round in the chamber has no effect on how many are in the magazine.
If you pull the slide back part way to check for a loaded round you'll have to push it back into battery manually.

Jim
 
If the mag is full the spring is pushing the rounds up into the bottom of the slide. Magazines that allow an extra round to be loaded will compress the spring more than a standard capacity mag and won't have as much give when you push it further. Working the slide manually is much different and you can feel the resistance. Unless you're having a feed problem I wouldn't worry about it. I personally only use standard capacity mags.
 
Ok, I'll make an example:
your magazine holds 8 rounds-
you put the magazine in the gun-
you cock it back and put one in the chamber-
you now take the magazine out of the gun and put an extra round in the magazine giving you 9 rounds total (magazine is full to capacity (8) and 1 is in the chamber
now try to check by pulling the slide back a little to see if a round is in a chamber... now if I release the slide at this point the slide slowly moves back to its normal position and sometimes not all the way.. therefor I have to guide it sometimes to get it to go all the way forward.
But if I only put 8 rounds in the magazine, cock it, and NOT add an extra round to the magazine than check the chamber it goes back on its own perfectly fine and rather quickly. I don't know how I can explain it any more detailed than that. Sorry for any confusions.

So my question is why is this? Not would, but Could it eventually effect the way it shoots. This occurs in 2 of my three guns. I don't know exactly how or why this happens, or anything about it for that matter, and if anyone else experiences the same thing?
 
I am familiar with what you are decribing.
The reason for this is that in some firearms the magazine springs have more tension than others.
In your case, with a fully loaded mag, the friction of the top bullet against the slide is enough to hold it from returning fully to battery, this happens only when you are not using the full force of the recoil spring (you are only pulling the slide back a little bit).

It varies between different guns and different magazines.
In my case I need a harder push to get a fully loaded mag in my S&W 4006 and Colt 1911(series 70) so that it locks in, whereas my Browning HP or my wife's glock 33 require no additional force (when comparing to a magazine that is not fully loaded)

I would not worry about it , but it hepls to remember (meaning, to train) to give the mag a hefty push when you do a mag-change and the slide is not locked back. It is not uncommon to see people who have not pushed the mag hard enough for it to lock home rack the slide and then try to fire, only to discover that they have an empty chamber.:eek:

Brgds,
Danny
 
What you are describing is normal. Some magazines have less "wiggle room" when fully loaded that others. One magazine might have 3/4 the diameter of one round left to compress the spring when fully loaded and another magazine might only have 1/4 the diameter of one round left as extra space.

A really tight magazine for a gun not rated as "+1" might not have enough wiggle room left when fully loaded to be completely inserted in the gun with the slide closed.
 
Use a "charging mag". Put one round in your charging mag, and hand cycle the gun to load the chamber. Remove the mag, and verify the round is gone. Now insert a full mag.
 
when i carried my xd40sc i never bothered with the 10th round(9+1). now that im carrying the kel tec p32 i figger i need every round i can get(7+1). when i first started doing my gun was as you described, now that the mag springs are broken in it doesnt do it any more.
 
Your trouble is coming from what we scientists call "spring pressure."

When you have a full mag inserted, you have the full pressure of the mag spring against the slide.

It's that simple.

What Dannyl says is good advice.
 
Ok, so my hypothesis was correct. Now as for the other question that wasn't addressed so much was does it have any long term effect or wear on the top of the slide that the round is rubbing against? Could this actually inquire more jams? I guess I'm being a worry-wart, but I guess its better to know than not to know. Thanks to those who have answered so generously.
 
No, it would have no detrimental effect on the bottom of the slide. Most of the time you are talking about a brass case or copper clad bullet rubbing against a hardened steel slide. If anything the slide will rub a flat spot on the top round of the magazine (not going to happen under the circumstances we are talking about).

Even if you use steel cased ammo, the steel of the case will still be much softer than that of the slide.
 
I understand what you are asking, and I understand everyones replies, but I am curious.
If you started with a full mag, and you rack the slide to load one in to the chamber, and you can put another in the mag, why are you checking to see where it went?
Not trying to be a smart a, just wanting to know. I guess I feel that the more you mess with the gun, the more chance you have of an ND.
 
He's doing a "brass check" to ensure that the extractor has properly engaged the rim of the case and will pull the spent case from the chamber when fired. I do that when I load my Taurus PT-145 for carry.
 
If you're not already doing it, make sure you're doing the slingshot method. IE: pulling slide back all the way and releasing it. That will cure many of the failure to go to battery problems.

Those little thingamabobs that catch the slide are slide catches, not slide releases.
 
knight0334 said:
If you're not already doing it, make sure you're doing the slingshot method. IE: pulling slide back all the way and releasing it. That will cure many of the failure to go to battery problems.

Those little thingamabobs that catch the slide are slide catches, not slide releases.
Click to expand...

That would defeat the whole purpose of what the OP is trying to accomplish because pulling the slide all the way back would eject the chambered round.
 
Topping off the mag definitely puts more pressure on the slide than simply chambering a round and leaving the mag down by a round from full capacity.

Beretta states that in the 92 that the compression on the mag spring when the magazine is one round down and the slide is forward is comparable to the compression on the mag spring when the magazine is fully loaded but out of the gun.

They half-heartedly recommend not topping off the magazine in the 92FS manual for that reason but they're obviously not dogmatic about it because they then give you a procedure for loading and topping off the magazine...
 
And if you are talking double-stack, then do the math. That one additonal round is only compressing the spring 1/2 of the round diameter, as they are stacked side by each.

Especially valid if you are talking 9mm or .40 rounds which are smaller than a .45 round...get down to 1/2 the diameter of a 9mm and there is not much difference in top-round pressure on the underside of the slide compared to a single-stack .45.
 
a. When you pull the slide back and let it go to chamber the first round, the slide is going forward against upward pressure from only 7 rounds remaining in the mag.

b. When you insert another round and seat the mag, you now have upward pressure from 8 rounds in the mag. This additional upward pressure creates drag against the bottom of slide when you release slide after pulling it back a little to see if a round is in a chamber.
 
I might be crazy but I swear I remember a guy telling me about his M and P .45 that would not allow you to go 10+1. I think he SHOWED me even! Disspell this as you please.
 
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