Resizing 9mm with Dillon SQDB

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LopezEL

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So I started having failures to extract and failures to feed with a stock Glock 19 at my last shooting session.The issues were with 124g Xtreme HP and 115 Xtreme RN bullets. Mostly, the rounds would not fully feed into the chamber... if they did, a manual extraction by racking the slide was very difficult.

I figured that my OAL was too long since I load long for my CZ pistols. Usually about 1.15. Also, the same rounds that were hanging up in the Glock were running fine in my CZ Shadow and P01.
Back at the reloading bench, I shortened the OAL to 1.125 and it fixed the majority of my failures but still not perfect.

95% of the rounds pass the plunk test in the Glock barrel... but then I noticed that my press was not fully resizing the brass. I'm using a Dillon Square Deal B.

I did some research and it led me to changing the "toolhead friction plate"... it was very worn. Now my press is definitely resizing more of the case but there is still a good bit of case left untouched.

Check out the pictures for reference... is that gap normal? Is there anything further I can do to adjust the resizing on a Dillon Square Deal B?

20180217_234012.jpg 20180216_153606.jpg 20180217_235958.jpg 20180218_000119.jpg
 
That looks to be the limit of the sizing die on the square deal b. My lnl ap appears to size 9mm brass the same. Short of finding a push through sizing die for 9mm there is nothing else you can do.

What does your crimp measure, and if the round fails in the glock barrel what does it look like?
 
Many dies have a radius at the mouth that helps thecase enter and there is the portion of the case that is in the shell holder as wel. This means that 100% of the case doesn’t get sized, ever.

This is why things like roll sizers and push through sizers exist, to size the portion that can’t be sized with normal operations.
 
A couple of things that maybe an issue, your OAL, normally I'm 1.100" with the Xtreme 115gr round nose. Also, your crimp in the photo looks to be a little excessive. Keep in mind that 9mm head spaces off of the case mouth. Measure the diameter of your case right at the bullet, it should be .380 inches. If it is less than this you are over crimping.
9mm%20Parabellum%20(Lugar)10.gif
 
I agree with Load Master, looks like you are over crimping.

The 9MM is a tapered case and it is important that the sizer die is screwed down far enough to just touch the shell plate when actually sizing a case, not just when you run the ram up with no case in it. Check that.
 
May be an optical illusion, but it looks like that sizer is shaped weird from the looks of the brass. May just be the camera.
 
I would measure the case length on one that is failing. Unlikely but if it significantly longer than the rest it could be a contributing factor. Lube the cases lightly to reduce downward force on the case when resizing. Lighten up the crimp so that is just barely removing the flaring at the case mouth. You're not resizing anything in this step so you just want to touch it back into place. My thought process is in thinking the downward force in these steps is pushing the case down and expanding the case at the base. None of these may have any effect in your situation but they are all easy to try.
 
Wondering if having a un or under supported area of the chamber will over a number of reloads allow the base of the brass just over the webb expand excessively. A different type/brand of sizing die on a SS press might restore your brass, or make some sort of bulge buster using the 9MM Lee FCD and a push rod. Does someone have a 40 bulge buster kit? Would the rod be small enough that it would work with 9MM brass? Or you could put the rod in a drill and work the diameter down with a file or stone to fit 9MM. If so one of these and a 9MM FCD would be your friend. How close to max are you loading these rounds? Backing off a bit if you can still get your accuracy might give you less trouble. That said, 9MM brass is cheap and just cull the ones that do not plunk before completing the reloading process. I know this would be a pain in a progressive :barf: but at least it would all work when shot. Good luck.:)
 
From the photos, Loadmaster might be on the right track. It looks like you might be overcrimping the case mouth and the case could be jamming in the leade. There look to be scuff marks on the case right below the mouth.
 
Never had a problem with my Glocks or Baby Eagle. However, after purchase of a 9mm 1911 I had the problem you report. The solution in my case was to get the an undersized Lee sizing die and set for resizing the full length. Never had a problem since. Also, I got a Lyman sizing gage to check each round, much better than using a barrel. Also, found that the seating die did all of the crimping that I needed so stopped using the 4th die (crimp die). The accuracy of my reloaded ammo increased.
 
Walkalong said:
Something about the case is too fat, which is what is making them hard to extract when they are jammed up.
Click to expand...

After trying some of the suggestions above, I still think it's a sizing issue. I de-primed/resized 10 cases and one of them failed the plunk test in my Glock barrel. It was an RP labeled case. I'll attach a picture of the 10 sized cases, there is a slight color difference in the bottom third of the case where I think the die is not touching.

I went ahead and loaded the 10 cases and the one suspect case feeds in the barrel but manual extraction of the case by hand is difficult. My OAL is at 1.12 on these and the crimp is not excessive.

I'll be calling Dillon tomorrow to see if they have any further suggestions.
20180218_163153.jpg
20180218_164050.jpg
20180218_164330.jpg
 
Did you make sure the sizer was just touching the shell plated when sizing a case?
 
Load Master said:
A couple of things that maybe an issue, your OAL, normally I'm 1.100" with the Xtreme 115gr round nose. Also, your crimp in the photo looks to be a little excessive. Keep in mind that 9mm head spaces off of the case mouth. Measure the diameter of your case right at the bullet, it should be .380 inches. If it is less than this you are over crimping.
View attachment 778712
Click to expand...

Just checked the crimp on the 10 rounds I loaded. They are measuring ~.376. I'll back off on the crimp but this doesn't take away from the fact that the first resize die is not fully resizing.
 
Walkalong said:
Did you make sure the sizer was just touching the shell plated when sizing a case?
Click to expand...

On the dillon square deal the proprietary die setup is screwed all the way down on the first step. Not much adjustment to make other than the replacement pressure plate that I already changed.
 
LopezEL said:
On the dillon square deal the proprietary die setup is screwed all the way down on the first step. Not much adjustment to make other than the replacement pressure plate that I already changed.
Click to expand...
If you measure the base what diameter are you showing? This will tell you if your sizing die isn't doing its job. Max should be .3910". As shown in the earlier posted drawing.
 
You will know when to start adding another zero into the measurements.
For example .xxx to +/-.0xxx.o_O
 
I also use a Dillon SDB for 9mm, any issues that i have had are related to seating depth of bullet. I have to adjust my OAL based on the fire arm. Between a JRC Carbine, Sig P320, M&P shield, i have to make specific loads (OAL) for each dependent on bullet being used.

The Picture of the SDB sizing a bullet is normal. that is the way it is designed. See the attached picture, there is really nothing you can resize that low on a 9m Brass. you are now working against the solid portion of the brass encasing the primer area.

LeftyTSGC. 9mmhalf.jpg
 
I had the same issue sizing 9mm on a 550 using Dillon dies. Some brass is slightly bulged at the base and isn't resized. Frustrating problems running it through a 9mm 1911 but they ran fine through 2 different Kahrs. I sort by plunk testing in the 1911 barrel. I am not aware of any push through sizing dies because it is a tapered case.
 
Picture in post #20 doesn't look like a 9mm case.

As to resizing dies, depending on the brand, OD and how far down the case base die resizes varies. My 40S&W Lee sizing die will produce smaller OD and resize further down the case base than Dillon or RCBS carbide resizers.

BTW, 9mm is a tapered case and cannot be push-through resized.
 
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