Holy Bullet Setback, Batman!

[MasonK]

This is a pic of the .45 ammo that has been sitting in the new 1911 for the last couple of weeks. I've never seen setback this prominent so quickly.

My question- is this normal for .45 ammo, or just Magtech 230 FMJ?

[Nalez]

This is a pic of the .45 ammo that has been sitting in the new 1911 for the last couple of weeks. I've never seen setback this prominent so quickly.

My question- is this normal for .45 ammo, or just Magtech 230 FMJ?

I would measure that; if you have device laying around. Here are the SAAMI specs: http://www.saami.org/PubResources/CC_Dr ... omatic.pdf

[XDM45]

This is a pic of the .45 ammo that has been sitting in the new 1911 for the last couple of weeks. I've never seen setback this prominent so quickly.

My question- is this normal for .45 ammo, or just Magtech 230 FMJ?

...and this my friends is why I DON'T carry one chambered or leave it in chambered in my .45ACP.

[plblark]

You're saying the setback occurred with it just sitting in the chamber?

[FJ540]

...and this my friends is why I DON'T carry one chambered or leave it in chambered in my .45ACP.

Do tell... How is it being in the chamber and walking around is any different than being in the mag?

After all, they don't fire unless you first put it in the hole.

[XDM45]

...and this my friends is why I DON'T carry one chambered or leave it in chambered in my .45ACP.

Do tell... How is it being in the chamber and walking around is any different than being in the mag?

After all, they don't fire unless you first put it in the hole.

When it's in the magazine, it's not chambered. It's in the magazine. Big difference. I can insert the magazine with 13 rounds and eject it and it will still have 13 rounds in it, unless I rack the slide and chamber one of them, then I have 12 left in it with 1 in the chamber.

When you chamber a round by racking the slide, it can cause setback if you chamber the same round over and over again. I have never heard seen setback occur on a round chambered once, nor (until now), have I heard of setback occurring from a .45ACP round just sitting in the chamber for a long time; but my theory (now proven by the OP) is that such setback can happen. Maybe this setback isn't an issue for 9mm, .40, but for .45ACP, it is. I also know that some people will "drop" a round in vs. racking it, gently sliding the rack, etc, all of which I think is a bad idea on any gun, let alone a carry weapon.

I'll keep one out of the chamber as I have been. Seems like a good idea. Others will disagree, and that's fine. Don't care. They aren't carrying my gun or living my life.

[MasonK]

You're saying the setback occurred with it just sitting in the chamber?

Took it for a test drive a week ago, came home and cleaned her up; loaded and charged with factory Magtech right out of the box and put her in storage. I just pulled it out to load the snap caps and practice drawing and speed reloads and that's what I found.

I can't say I've ever seen setback like that, even on rounds chambered and rechambered a dozen times. I recall someone here talking about taking a micrometer to their numerously rechambered carry rounds and not seeing more than the tiniest fraction of setback.

Unfortunately, I don't have a micrometer handy here at home to give exact measurements.

[FJ540]

He said it was sitting in his gun for 2 weeks. Not that he'd cycled it in and out of battery a dozen times.

[XDM45]

You're saying the setback occurred with it just sitting in the chamber?

Took it for a test drive a week ago, came home and cleaned her up; loaded and charged with factory Magtech right out of the box and put her in storage. I just pulled it out to load the snap caps and practice drawing and speed reloads and that's what I found.

I can't say I've ever seen setback like that, even on rounds chambered and rechambered a dozen times. I recall someone here talking about taking a micrometer to their numerously rechambered carry rounds and not seeing more than the tiniest fraction of setback.

Unfortunately, I don't have a micrometer handy here at home to give exact measurements.

Is this the MagTech with UPC 754908119011 ? If so, I have the exact same ammo and would be willing to toss a brand new round into my XDM .45 caliber and let it sit for 2 weeks as an experiment. Obviously I have a different gun and ammo lot than you do, but I'd be willing to also use one of your rounds to sit in my gun for 2 weeks, then the only different would be the gun itself.

[MasonK]

When you chamber a round by racking the slide, it can cause setback if you chamber the same round over and over again. I have never heard seen setback occur on a round chambered once, nor (until now), have I heard of setback occurring from a .45ACP round just sitting in the chamber for a long time; but my theory (now proven by the OP) is that such setback can happen. Maybe this setback isn't an issue for 9mm, .40, but for .45ACP, it is. I also know that some people will "drop" a round in vs. racking it, gently sliding the rack, etc, all of which I think is a bad idea on any gun, let alone a carry weapon.

Early on I used to drop a round into the tube and close the slide, but I noticed that the rim would get bent by the ejector arm while a magazine load of the round didn't because, well, I was doing something I shouldn't be doing with that particular gun. Now I load the mag, and let the spring move the action since I figure the engineers know how hard the slide should move. So to answer your question, nothing unusual about how I load a gun. No jamming the action or gently rolling it in.

[XDM45]

When you chamber a round by racking the slide, it can cause setback if you chamber the same round over and over again. I have never heard seen setback occur on a round chambered once, nor (until now), have I heard of setback occurring from a .45ACP round just sitting in the chamber for a long time; but my theory (now proven by the OP) is that such setback can happen. Maybe this setback isn't an issue for 9mm, .40, but for .45ACP, it is. I also know that some people will "drop" a round in vs. racking it, gently sliding the rack, etc, all of which I think is a bad idea on any gun, let alone a carry weapon.

Early on I used to drop a round into the tube and close the slide, but I noticed that the rim would get bent by the ejector arm while a magazine load of the round didn't because, well, I was doing something I shouldn't be doing with that particular gun. Now I load the mag, and let the spring move the action since I figure the engineers know how hard the slide should move. So to answer your question, nothing unusual about how I load a gun. No jamming the action or gently rolling it in.

Yeah, the first way you did it is bad, as you discovered. The gun is made to function a certain way. That's one reason I cringe when I see people "ride the slide" when they first rack a round. Dropping rounds in, riding the slide, all go against the desgin and proper function of the weapon.

[MasonK]

And by early on, I mean early in my firearms ownership in the 90s, not last week!

[XDM45]

And by early on, I mean early in my firearms ownership in the 90s, not last week!

Got it.

[MasonK]

And by early on, I mean early in my firearms ownership in the 90s, not last week!

Got it.

I figured; that was more for thread clarity so this doesn't turn into 8 pages asking why I am tube-feeding my guns.

[XDM45]

And by early on, I mean early in my firearms ownership in the 90s, not last week!

Got it.

I figured; that was more for thread clarity so this doesn't turn into 8 pages asking why I am tube-feeding my guns.

Right now with ammo prices being what they are, (along with availability), I'm going to try and retrofit my XDM to shoot those Nerf rounds. The only ammo setback I've seen is the setback that I can't seem to get anymore ammo!!