SR1911 making deep marks on case mouth

Evad · September 9, 2014, 11:16 AM

Hey guys, I just recently picked up an SR1911. I Haven't taken it to the range yet, but I was fiddling with it at home and noticed that when I chamber a round and manually eject it, they all come out with a deep scratch on the case mouth. Deep enough to make me not want to reload the brass for fear of the case splitting when I fire them. Please advise.

KyJim · September 9, 2014, 11:27 AM

Photo might be helpful.

precision_shooter · September 9, 2014, 12:20 PM

Scratch or small crease, maybe from a sharp edge on the feed ramp?
Can you slowly eject a round and keep track of how it was oriented when ejecting to note whether the scratch is on the top, side, or bottom of the round as chambered?

WESHOOT2 · September 9, 2014, 12:58 PM

To scratch a case you have to have a sharp edge somewhere.....

T. O'Heir · September 9, 2014, 01:34 PM

A scratch won't do anything to the case. Fiddling with live ammo isn't exactly a good idea either. As mentioned, there's a sharp edge on the feed ramp. Use a magnifying glass, find it and remove it. Emery cloth will likely be enough. No rotary tools.

polyphemus · September 9, 2014, 02:32 PM

Loading and ejecting is not a good idea to begin with,you are inviting bullet
setback.Grinding,filing and otherwise modifying anything may void your warranty.
Please hold your impulses until you are at a safe place to shoot a few rounds
then save two or three cases and post a picture.
If it turns out to be a defect of some sorts then Ruger will help.
Or it could be the magazine.

AKexpat · September 9, 2014, 02:50 PM

A decade or so ago I bought an assembled-from-parts 1911 on an aluminum Para-Ord P-14 frame for just south of $400. The pistol functioned just fine but would leave a shallow longitudinal v-shaped dent about 1/16th inch long on the empty case mouth. Finally traced it to the ejecting case impacting the shallow ejection port on the slide, which had no mfr. markings at all. I reloaded the spent cases with no problems. I figured it was caused by the extractor angle/tension. I no longer have the pistol to compare with the OP's situation.

polyphemus · September 9, 2014, 03:06 PM

This is mostly an extractor tension issue and when properly set it will eliminate this annoyance.Relieving the ejection port edges where the cases rub on their
way out is going a little too far for this issue especially since fixing the extractor
tension will at worst allow only a slight easily polished blemish.

September 9, 2014, 11:16 AM	#1
Evad Member Join Date: February 4, 2011 Location: Fond du Lac, WI Posts: 37	SR1911 making deep marks on case mouth Hey guys, I just recently picked up an SR1911. I Haven't taken it to the range yet, but I was fiddling with it at home and noticed that when I chamber a round and manually eject it, they all come out with a deep scratch on the case mouth. Deep enough to make me not want to reload the brass for fear of the case splitting when I fire them. Please advise. __________________ Only accurate rifles are interesting.

September 9, 2014, 12:20 PM	#3
precision_shooter Senior Member Join Date: September 8, 2007 Location: DFW, Texas Posts: 2,475	Scratch or small crease, maybe from a sharp edge on the feed ramp? Can you slowly eject a round and keep track of how it was oriented when ejecting to note whether the scratch is on the top, side, or bottom of the round as chambered? __________________ "Laws that forbid the carrying of arms...disarm only those who are neither inclined nor determined to commit crimes...Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man." - Thomas Jefferson, 1776

September 9, 2014, 12:58 PM	#4
WESHOOT2 Senior Member Join Date: February 20, 1999 Location: home on the range; Vermont (Caspian country) Posts: 14,324	To scratch a case you have to have a sharp edge somewhere..... __________________ . "all my ammo is mostly retired factory ammo"

September 9, 2014, 01:34 PM	#5
T. O'Heir Senior Member Join Date: February 13, 2002 Location: Canada Posts: 12,453	A scratch won't do anything to the case. Fiddling with live ammo isn't exactly a good idea either. As mentioned, there's a sharp edge on the feed ramp. Use a magnifying glass, find it and remove it. Emery cloth will likely be enough. No rotary tools. __________________ Spelling and grammar count!

September 9, 2014, 02:32 PM	#6
polyphemus Senior Member Join Date: June 24, 2012 Posts: 1,055	fiddling Loading and ejecting is not a good idea to begin with,you are inviting bullet setback.Grinding,filing and otherwise modifying anything may void your warranty. Please hold your impulses until you are at a safe place to shoot a few rounds then save two or three cases and post a picture. If it turns out to be a defect of some sorts then Ruger will help. Or it could be the magazine. Last edited by polyphemus; September 9, 2014 at 02:39 PM.

September 9, 2014, 11:27 AM	#2
KyJim Senior Member Join Date: July 26, 2005 Location: The Bluegrass Posts: 9,142	Photo might be helpful.

September 9, 2014, 02:50 PM	#7
AKexpat Senior Member Join Date: January 5, 2014 Location: SW WA State Posts: 490	A decade or so ago I bought an assembled-from-parts 1911 on an aluminum Para-Ord P-14 frame for just south of $400. The pistol functioned just fine but would leave a shallow longitudinal v-shaped dent about 1/16th inch long on the empty case mouth. Finally traced it to the ejecting case impacting the shallow ejection port on the slide, which had no mfr. markings at all. I reloaded the spent cases with no problems. I figured it was caused by the extractor angle/tension. I no longer have the pistol to compare with the OP's situation.

September 9, 2014, 03:06 PM	#8
polyphemus Senior Member Join Date: June 24, 2012 Posts: 1,055	V shaped dent This is mostly an extractor tension issue and when properly set it will eliminate this annoyance.Relieving the ejection port edges where the cases rub on their way out is going a little too far for this issue especially since fixing the extractor tension will at worst allow only a slight easily polished blemish.