Extended mags causing me problems with my 40SC - XDTalk Forums - Your HS2000/SA-XD Information Source!

AV8R · 02-26-2008, 07:19 PM

Ok, I replied in another thread about the slide locking open while shooting with the 12 round extended mag in my XD40SC...

Quote:

I experienced this very same thing yesterday at the range. XD40SC with two 9 round mags and the 12 rounder with the grip extension. The 12 rounder locked the slide back at around the 4th or 5th round and again at the 9th round or so. I thought that maybe the different feel of the extended grip compared to the SC mags (with PGE) might have caused me to thumb the slide lock. But now I'm not so sure. And I was shooting Winchester ammo, too.

I've never had a problem from that mag before, and it failed consistently yesterday. I might try tweaking the feed lips a tad and see what happens.

I didn't touch the feed lips. I ordered a mag accessory kit instead, and I brought old and new mags to the range yesterday. All of my mags are numbered so I can keep track of who's naughty and who's nice.

I'll be damned if the new extended magazine didn't do the same thing.

I'm almost sold on the idea that the bigger magazine is changing my grip and my thumb is hitting the slide stop lever. All my SC mags have pearce grip extensions and I don't have any problems with them. I'm going to have to take some time and shoot those 12 rounders in such a way that will eliminate my thumb from the equation. Then we'll see if there are any failures. I'd like to be able to use those mags, or at least depend on them should I need to toss one or two in a pocket real quick.

nickb · 02-26-2008, 10:06 PM

I quit using the extended mags on my 40sc because I could feel them shift when I fired. Don't know if this is part of the issue, but it just bugged the heck out of me.

m14 · 02-27-2008, 05:18 AM

If you bought your SC as a defense/carry weapon, probably better to forget about the hi-cap mags and train only with the shorter one you will have in the pistol when carrying. I bought a second short one, and never took the extended mags out of the case.

gridboy · 02-27-2008, 07:52 AM

Maybe this is relevant? This discusses a problem with the rounds
in the .40 XD magazine bumping up against the slide release, causing
premature slide lock.

Premature Slide Lock with the XD-40:Causes & Possible Cure

gridboy

AZXD40 · 02-27-2008, 08:00 AM

Quote:

Originally Posted by gridboy

Maybe this is relevant? This discusses a problem with the rounds
in the .40 XD magazine bumping up against the slide release, causing
premature slide lock.

Premature Slide Lock with the XD-40:Causes & Possible Cure

gridboy

This is most likely what is happening due to the extended magazine not being supported horizontally. When you apply a grip to the magazine it causes it to shift, in effect it could do the same thing mentioned in this article

AV8R · 02-27-2008, 07:11 PM

Quote:

Originally Posted by m14

If you bought your SC as a defense/carry weapon, probably better to forget about the hi-cap mags and train only with the shorter one you will have in the pistol when carrying. I bought a second short one, and never took the extended mags out of the case.

I don't carry the extended mags, but I would like for them to friggin work since SA gave me one with my gun and one in my mag kit. And of course I might have to rely on those 12 rounders when the zombies arrive.

AV8R · 02-27-2008, 07:16 PM

Quote:

Originally Posted by AZXD40

This is most likely what is happening due to the extended magazine not being supported horizontally. When you apply a grip to the magazine it causes it to shift, in effect it could do the same thing mentioned in this article

hmmmmmmm... Seems plausible. Either way, those 12 rounders are useless to me, unless I go buy an XD40 Service. But, I really want an XD45.

Vic303 · 02-27-2008, 07:29 PM

This happened to me once with an XD45compact but I don't recall if it was on a 10 or 13 rnd mag. I was wearing gloves at the time and may well have contacted the slide release with the edge of a gloved thumb.

AggieChemDoc · 02-29-2008, 06:30 AM

I have had this same problem with my XD40SC. I usually get one or two per hundred rounds when shooting my 12-rd mag.

Does anybody know if SA has addressed this? I see the article was written in 2k4.

I'm considering the mods in that article, but would rather have a factory-approved solution, rather than taking a file to my new baby.

Vic303 · 02-29-2008, 07:11 AM

I looked at the positioning of the top 2 rnds on the 45 mags and they are nearly vertical. Only a slight R-L displacement of rnd 2. With the slide off, the slide release does not appear to come anywhere near the rounds with either mag, and even with a lateral pressure applied to move the mag closer to the lever. My guess is my malf was due to gloved fingers getting in the way.

02-26-2008, 10:06 PM	#2
nickb XDTalk 2K Member Join Date: Jul 2006 Posts: 2,346	I quit using the extended mags on my 40sc because I could feel them shift when I fired. Don't know if this is part of the issue, but it just bugged the heck out of me. __________________ No PM sent..... But the average human can travel 21 feet in just about one second.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

02-27-2008, 05:18 AM	#3
m14 XDTalk Newbie Join Date: Feb 2008 Posts: 15	If you bought your SC as a defense/carry weapon, probably better to forget about the hi-cap mags and train only with the shorter one you will have in the pistol when carrying. I bought a second short one, and never took the extended mags out of the case.

02-27-2008, 07:52 AM	#4
gridboy XDTalk Newbie Join Date: Feb 2008 Posts: 23	Maybe this is relevant? This discusses a problem with the rounds in the .40 XD magazine bumping up against the slide release, causing premature slide lock. Premature Slide Lock with the XD-40:Causes & Possible Cure gridboy

02-27-2008, 07:29 PM	#8
Vic303 XDTalk 100 Member Join Date: Sep 2007 Posts: 156	This happened to me once with an XD45compact but I don't recall if it was on a 10 or 13 rnd mag. I was wearing gloves at the time and may well have contacted the slide release with the edge of a gloved thumb.

02-29-2008, 06:30 AM	#9
AggieChemDoc XDTalk 100 Member Join Date: Feb 2008 Location: WV Posts: 119	I have had this same problem with my XD40SC. I usually get one or two per hundred rounds when shooting my 12-rd mag. Does anybody know if SA has addressed this? I see the article was written in 2k4. I'm considering the mods in that article, but would rather have a factory-approved solution, rather than taking a file to my new baby.

02-29-2008, 07:11 AM	#10
Vic303 XDTalk 100 Member Join Date: Sep 2007 Posts: 156	I looked at the positioning of the top 2 rnds on the 45 mags and they are nearly vertical. Only a slight R-L displacement of rnd 2. With the slide off, the slide release does not appear to come anywhere near the rounds with either mag, and even with a lateral pressure applied to move the mag closer to the lever. My guess is my malf was due to gloved fingers getting in the way.