Alright, another newbie to auto reloading question!  Loaded tons of revolver and rifle cartridges, but bent brass from slide is a new thing to me...  Are brass like this throwaway or should it try to work it out with a dowel or something?

I would chuck it.

Further, this probably is a sign that the extractor isn't holding the brass tight enough.  That was the solution when I had this issue, though my brass was beyond help:

Quick question. With my former Glock 29, I would occasionally have a little ding on the brass mouth. I'm assuming it was hitting the slide on the way out. It usually happened with hot loads. What would cause this?

Well let us look at the possible causes...

#1 Slide not traveling far enough to the rear to get kick out by the ejector from under the extractor and the cartridge gets trapped by the returning slide.  This can be light loads for the recoil setup, recoil spring binding up, dry or gummed up slide rails.

#2 The extractor holding too tightly or is gummed up by carbon and or fouling not letting the cartridge to turn loose when struck by the ejector at the rear of the slide travel.

#3 Worn extractor & spring that could be letting go the spent casing, and it bounces around before it strikes the ejector and is trapped by the returning slide and the barrel hood!

#4 Use of really hot loads or slow burning powder where the pressure pushes the cases tightly against the chamber walls, this usually leaves the brass inside the chamber, but it can also pull free of the extractor in an recoil timing event.

As in the case of the G-29 it is probably a higher impulse cartridge slamming the slide rearward fast enough to fling the brass against the slide near the extractor.  You should see a marking of the brass where it is contacting that area of the slide.

Recoil springs may change the timing to lessen or eliminate that issue.

The couple that happened to me were on a new (under 1,000 round through it) Gen4 G20 with a 22 lbs RSA and Underwood ammo 180gr FMJs (so hot loads).  I might go back and try with stock RSA...

You would more than likely need a 23lb spring set for the UW.   Is you 22 lb a single spring? or is it a dual spring setup?

Quote from: The_Shadow on March 10 2015 08:54:16 PM MDT
You would more than likely need a 23lb spring set for the UW.   Is you 22 lb a single spring? or is it a dual spring setup?

It is a single spring, that was about all I could find anywhere.  If you know of anyone making an aftermarket dual spring I would give it a shot!

I'm using the Wolff Gun Springs non captive so I can change springs as needed.  It is a two piece rod and dual spring setup.
You can scroll down from this link...they even send you a striker spring as well with a recoil spring order.
http://www.gunsprings.com/index.cfm?page=items&cID=1&mID=5

Quote from: The_Shadow on March 10 2015 08:41:50 PM MDT
As in the case of the G-29 it is probably a higher impulse cartridge slamming the slide rearward fast enough to fling the brass against the slide near the extractor.  You should see a marking of the brass where it is contacting that area of the slide.

Recoil springs may change the timing to lessen or eliminate that issue.

I don't have the experience or knowledge that a lot of you guys have... but I feel this is what is happening here.  A simple test would be try a heavy spring and see what happens, and try lighter ammo and see what happens.

Yes, the lighter ammo works fine.  All the LAX I picked up were perfect so far (only ordered 250 rounds though).  UMC, Freedom Munitions, Georgia Arms, LAX, etc work great in stock configuration on my G20 & G29 both Gen4.  I had a couple of questions on the Underwood and was able to talk with Kevin and he suggested trying a 22# (G20) and 21# (G29).  They both shot the Underwood fine in stock configuration, just little nuances that I wanted to "tune" out...  Like I stated originally, i have only seen 2 instances of crimped brass out of 500 - 1,000 rounds, heck I have lost many more casings than that!  I haven't shot my S&W 1006 since I have been collecting my brass, so I had very little to compare.

My goal is to load somewhere between Underwood and LAX or Georgia Arms for everyday target practice...

BTW cwall64, the Wolff Gun Springs don't work for the 4th Gen, because of the larger hole in the front of the slide for the RSA.  Someone was making a bushing for some springs to with the Gen 4, don't recall who it was at the moment.

Glock did have some new RSA for the Gen 4's to work better than the original offering.  Lone Wolf Dist did come out with a new spring for the gen 4's so you may want to investigate them.

Quote from: The_Shadow on March 10 2015 10:10:39 PM MDT
BTW cwall64, the Wolff Gun Springs don't work for the 4th Gen, because of the larger hole in the front of the slide for the RSA.  Someone was making a bushing for some springs to with the Gen 4, don't recall who it was at the moment.

Glock did have some new RSA for the Gen 4's to work better than the original offering.  Lone Wolf Dist did come out with a new spring for the gen 4's so you may want to investigate them.

Yes, I was looking at the LWD one, but they still haven't released more than stock weight according to website.  I have a Glockmiester, so I think I'll order the 24 # ISMI spring and replace the spring on the one I have and test.

I didn't call Glock, I kind of made an assumption that since the fire dates on the included brass were Q4 2014 I should be good, but it would not hurt to give them a call and double check!  I'll put on the todo list for tomorrow...  (But it has to go below 1911 10mm shopping!)

Quote from: cwall64 on March 10 2015 05:36:24 PM MDT
Alright, another newbie to auto reloading question!  Loaded tons of revolver and rifle cartridges, but bent brass from slide is a new thing to me...  Are brass like this throwaway or should it try to work it out with a dowel or something?

Truthfully, that could be made to work by straightening it with a dowel then finishing it with the sizing die and case mouth expander. It wouldn't be a safety issue even though the extra work might cause it to split on the next firing. It might, however leave something a bit sharp and shave the bullet since you likely won't get it perfectly back to round. If it were me, I'd toss it in the brass recycling bucket.

Quote from: cwall64 on March 10 2015 05:36:24 PM MDT
Alright, another newbie to auto reloading question!  Loaded tons of revolver and rifle cartridges, but bent brass from slide is a new thing to me...  Are brass like this throwaway or should it try to work it out with a dowel or something?

KIMBER?



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