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  #1  
Old 03-10-2019, 10:58 AM
GySgt 7291 GySgt 7291 is offline
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9mm Casings

I've only been reloading 9mm a couple years but I've found that every round has to go through the chamber gauge and on average 1 of 50 will not pass. With 45 ACP I only do a sampling, +/- 10% and never had any issues. The problem is mostly with WIN and FC casings but there have been others, the base will not go flush or not at all. Putting it through the taper crimp a second time doesn't help. I've taken measurements but nothing stands out.
I disassemble the round and discard the casing and replace it. I discovered this the hard way at the range having to dislodge a couple rounds that would not chamber or eject.
Taper crimp .377 and COL 1.125.
Anyone else encountered this or suggestions? After checking every round with the chamber gauge never had another malfunction.
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Old 03-10-2019, 11:23 AM
Oldfut808 Oldfut808 is offline
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I measure factory ammo mouth diameter at 374 to 375.
I suggest duplicating that.
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  #3  
Old 03-10-2019, 11:57 AM
flechero flechero is online now
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Be sure you're seating the bullets squarely... the only time I ever had an issue like that was due to bullets seating slightly crooked. I now pay closer attention to setting bullets atop brass.

Try this- next time you get a fail, pull the bullet and resize brass and carefully seat a bullet squarely. See if if gauges. Mine almost always worked the 2nd time [~90% of the time] so I was convinced it was me just not starting a bullet squarely.
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  #4  
Old 03-10-2019, 02:53 PM
GySgt 7291 GySgt 7291 is offline
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I tightened up the crimp a little to .376, that's the same as the S&B I have on hand and keep a better eye on the placement. It will be a little while before I load anymore 9mm, I loaded my last 500 on hand before posting this thread.
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Old 03-10-2019, 09:24 PM
jjfitch jjfitch is offline
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Quote:
Originally Posted by GySgt 7291 View Post
I've only been reloading 9mm a couple years but I've found that every round has to go through the chamber gauge and on average 1 of 50 will not pass. With 45 ACP I only do a sampling, +/- 10% and never had any issues. The problem is mostly with WIN and FC casings but there have been others, the base will not go flush or not at all. Putting it through the taper crimp a second time doesn't help. I've taken measurements but nothing stands out.
I disassemble the round and discard the casing and replace it. I discovered this the hard way at the range having to dislodge a couple rounds that would not chamber or eject.
Taper crimp .377 and COL 1.125.
Anyone else encountered this or suggestions? After checking every round with the chamber gauge never had another malfunction.
No, I rarely use a chamber gage unless I'm trying to verify OAL!

You may be reloading cases fired from Glocks at high pressures where the case head is expanding and your die will not resize all the way to the "bottom!

Case heads may not get resized all the way to the "bottom" due to sizing die design requirements.

Even heads that are slightly raised will still fire without issue.

What gun?

What sizing die?

How clean is your chamber?

Is it in spec?

Is it smooth, polished?


Smiles,
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Last edited by jjfitch; 03-10-2019 at 09:31 PM.
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  #6  
Old 03-10-2019, 10:03 PM
jmorris jmorris is offline
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A regular size die can’t ensure the rim is the proper dimension because that part is in the shell holder/plate so the case can be pulled back out of the die.

The ones that fail your case gauge might be fixed if you insert them base down and give them a twist.

I use roll sizers that clean up the rim and extractor grove, a push through sizer will fix the rim too.

This is the reason to use a case gauge, as you won’t find this problem just plunking in the barrel as most barrels won’t contact damaged rims. So you don’t find the problem until the gun malfunctions because the round didn’t slide up into the breech face.
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Last edited by jmorris; 03-10-2019 at 10:07 PM.
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  #7  
Old 03-11-2019, 12:00 AM
Tearlach61 Tearlach61 is offline
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I have recently run into the same problem. I was shooting in a match and I had several misfeeds. I pulled the rounds aside and did some foresics afterwards. I found that they were a bit too fat in the base. Currently all I have for a case gauge is the barrel of my XD but I have a notion to pick up a case gauge at some point. At a minimum, I mean to check any rounds I intend to use for self defense or competition.
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  #8  
Old 03-11-2019, 04:37 AM
270jrwt 270jrwt is offline
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Use a Lee bulge buster with a 9mm makarov die and problem solved.
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  #9  
Old 03-11-2019, 06:17 AM
Nitro.45 Nitro.45 is offline
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Originally Posted by 270jrwt View Post
Use a Lee bulge buster with a 9mm makarov die and problem solved.
I was waiting for that one to come along...........let the games begin!
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Old 03-11-2019, 06:27 AM
Oldfut808 Oldfut808 is offline
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Originally Posted by Nitro.45 View Post
I was waiting for that one to come along...........let the games begin!
...
LEE FCD!
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  #11  
Old 03-11-2019, 07:35 AM
Rwehavinfunyet Rwehavinfunyet is offline
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9mm cases that won't fit.....

Just about any high pressure brass pistol case has the potential to have a bulge near the base of the case that won't allow the round to fully seat in the chamber... At my local range, USPSA shooters that shoot 9mm Major loads may cause 9mm cases to bulge. At one time, Glock .40 pistols had a problem with causing .40 cases to bulge, but they corrected the issue.

When I make reloads for competition or self defense shooting for 9mm, .38 super, and .45acp, I always use a 7-hole EGW chamber checker, and drop check every round to make sure they will seat flush. If they seat flush in the chamber checker, they will work in my guns..... I seldom if ever have a problem with my reloads. I prefer new or once fired cases for self defense rounds....
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Old 03-11-2019, 01:55 PM
mikld mikld is offline
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If my guns' chamebrs are tight, near SAAMI minimum, a gauge would work. But none of my semi-autos have such tight chambers so I rely on the plunk test (I load for 7 semi-autos). I've had no chambering problems since I learned the plunk test about 27 years ago...
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  #13  
Old 03-11-2019, 06:13 PM
WalterGC WalterGC is offline
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I load on two 650s, one for 9mm, another for .45acp. I use the Lee 4 die set. I've never seen a bulged 9mm or .45acp case. 99.99999078% of my approximately eleventy-zillion reloads have been shot through my Glocks. My ammo never fails to chamber and never jams.
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Old 03-11-2019, 07:49 PM
jmorris jmorris is offline
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I didn’t get roll sizing machines until I got into SMG’s. If you haven’t ever seen bulged 45 ACP or 9mm you haven’t picked up a lot of SMG brass. It still works fine after roll sizing but I still, keep it segregated from “the good stuff”.

Lots of fallacy about “Glocked” brass for sure.
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Old 03-11-2019, 09:45 PM
Oldfut808 Oldfut808 is offline
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Quote:
Originally Posted by WalterGC View Post
I load on two 650s, one for 9mm, another for .45acp. I use the Lee 4 die set. I've never seen a bulged 9mm or .45acp case. 99.99999078% of my approximately eleventy-zillion reloads have been shot through my Glocks. My ammo never fails to chamber and never jams.
....
Glocks will chamber a small suv
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  #16  
Old 03-11-2019, 09:56 PM
Black Jack Black Jack is offline
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What bullets are you using, are they plated?

I found that, with 9mm, there is a fine line between too little and too much flare on the case mouth. too much flare and, obviously, you will ruin the case. But, if you have too little flare, with plated bullets, you can end up with the majority coming out fine, but still have a substantial number come out that will not chamber all the way. They look fine, and measure fine, but the bullet itself gets bulged just enough that it will fail to chamber by about 1/8 of an inch.

Took a lot of trial and error before I realized what was causing my problem. Never had this problem with 45 ACP, only 9mm. My guess is that it is because the 9mm is actually a tapered case and this makes it much more sensitive to the amount of case flare, especially when using plated bullets which are much softer than jacketed bullets.

Edit: A quick way to test to see if this is your problem is to take a kinetic bullet puller and pull the bullet from one of the rounds that is failing to chamber. Once the bullet is out of the case, see if the case will chamber in your barrel before doing anything to it. If the case chambers fine, try to increase your case mouth flare, just a little bit, to see if it helps.

Last edited by Black Jack; 03-11-2019 at 10:04 PM.
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  #17  
Old 03-12-2019, 05:41 AM
Rwehavinfunyet Rwehavinfunyet is offline
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9mm Plated bullets.....

First off, I have never found 9mm (.355") bullets to be as accurate as JHP bullets. Precision Delta makes good JHP bullets that are accurate and a reasonable price, and often times the same price as plated bullet mfg's. I also like Montana Gold bullets, but to get a decent price, it is best to purchase a case, which is over 3K bullets per case.

For 9mm self defense loads, I like and use Speer Gold Dot (JHP) bullets.....

A decent and accurate mid range 9mm load is 4.0 gr. of Tite Group with a Prec. Delta 124 gr. JHP bullet.....
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Old 03-13-2019, 01:18 PM
mans mans is offline
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Rwehavin. . .if you don't me asking, what COL did you use with the 9mm Prec Delta 124 JHP? Also, have you explored the max/min charges for that bullet/powder combination? Thanks.
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Old 03-14-2019, 05:34 AM
Rwehavinfunyet Rwehavinfunyet is offline
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9mm reloads

According to the Lyman 50th edition reloading manual, the max COAL is 1.169" when using a round nose bullet profile.

Since a JHP has a much shorter profile, I load my Prec. Delta 124gr. JHP to obtain a COAL of 1.090" Using Tite Group powder, a charge weight of 4.0 grains is a mid-range velocity, light charge, so it is within the proper specs. My loads show a muzzle velocity of roughly 1030-1040 fps from my gun(s).

For self defense 9mm loads, I load with Vhitavuori 3N37 powder that makes 9mm+P rated velocity, using 125 gr. Speer Gold Dot JHP bullets..... However, for self defense, I often carry an STI 2011 .38 super, also with 125 gr. Speer Gold Dot or Hornady XTP bullets....my load is in the 1,350 fps from the muzzle range.....which is comparable to a low end .357 magnum muzzle velocity.....

Last edited by Rwehavinfunyet; 03-14-2019 at 05:37 AM.
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Old 03-14-2019, 08:37 AM
mans mans is offline
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Rwehavin. . .Thanks for the info. I bought a sample pack of JHP 124 9mm from Precision Delta and am looking forward to trying them out.
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  #21  
Old 03-14-2019, 08:47 AM
GySgt 7291 GySgt 7291 is offline
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The last batch of SNS coated 125gr RN I loaded was COL 1.125 from the Hodgdon and Alliant load data. I used several powders I had on hand, Titegroup-HP-38-Sport Pistol, and loaded 100 each to sample with the chronograph. All worked very well in my Glock 34, no feeding or cycling problems. All had similar groups and feel and all around 1100fps.
Here's what I found with groups of 10
HP-38 4.2gr 1108fps SD 16.1 1100fps SD 12.8
Sport Pistol 4.0gr 1115fps SD 11.9 1121 SD 18.5
Titegroup 3.6gr 1062fps SD12.3 1068fps SD 23.6
Titegroup 3.8gr 1114fps SD11.9 1110fps SD 18.1
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Last edited by GySgt 7291; 03-14-2019 at 08:56 AM.
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  #22  
Old 03-21-2019, 03:59 PM
GySgt 7291 GySgt 7291 is offline
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Quote:
Originally Posted by Rwehavinfunyet View Post
According to the Lyman 50th edition reloading manual, the max COAL is 1.169" when using a round nose bullet profile.

Since a JHP has a much shorter profile, I load my Prec. Delta 124gr. JHP to obtain a COAL of 1.090" Using Tite Group powder, a charge weight of 4.0 grains is a mid-range velocity, light charge, so it is within the proper specs. My loads show a muzzle velocity of roughly 1030-1040 fps from my gun(s).
I haven't reloaded JHP for 9mm, always used coated since I started a couple years ago. Based upon what you and others said I ordered 100 Precision Delta 124 JHP to try and I already had 1000 Zero 125 JHP and both arrived today.
For comparison I measured the bullets and loaded a dummy round for each one. I also used the same seating die setting for SNS 125gr coated RN to see how much adjustment would be needed.
Precision Delta .582 length .355 diamater 1.08 COL
Zero .582 length .356 diameter 1.087 COL

The Lyman 50th edition has OAL 1.075 for 125gr JHP and Hodgdon has COL 1.09. I am planning on using the 1.08 OAL with 4.0gr Titegroup and see what the chronograph says.
Anyone have opinions on the 1.08 length? Lyman publishes max 4.2gr Titegroup at 1.075 and Hodgdon max 4.4gr at 1.09.
Thanks
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Old 03-21-2019, 05:07 PM
flechero flechero is online now
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Quote:
Originally Posted by GySgt 7291 View Post
Anyone have opinions on the 1.08 length? Lyman publishes max 4.2gr Titegroup at 1.075 and Hodgdon max 4.4gr at 1.09.
Thanks
That's a factor of function in your particular gun... if that length feeds and extracts, go with it.
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  #24  
Old 03-23-2019, 10:48 AM
WalterGC WalterGC is offline
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FWIW, I thought casings were hog guts that you stuff sausage meat into!
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  #25  
Old 03-24-2019, 12:28 PM
Andyk Andyk is offline
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Do case gauges account for the taper in 9mm or is it a straight hole? I too get an occasional round that won't chamber even though it passed the case gauge. to thick at the mouth? I guess I should measure
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