Squib mystery!

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Been reloading 9mm FMJBT and .223 for some time with my Dillon 550B and never had a squib load. About 2 weeks ago, I acquired a Dillon Square Deal B, 8 pounds of Unique and about 2,000 SmallBall 125gr unjacketed bullets from Missouri Bullets. Add in his expertly gunsmithed Beretta 92FS for $500... yeah... I got a pretty good deal. <Youth. He had to pay off his second DUI charge. That will teach him... we all hope anyway>

Love the Dillons... you can pull it off your bench, throw it in the trunk of a car and drive down 50 miles of back country road and if it was set to dispense 4 grains before... gosh darn it... it'll dispense 4 grains after. And that's about what this guy I got if from had it set for.... about 4 gr of Unique and came out with an OAL of 1.105"

Looking up the data that seemed about middle of the road so I loaded up about 150 rounds and headed for the range. About 30 rounds into punching some paper targets, I got my first ever squib. Fortunately, the next round wouldn't even chamber. Unfortunately, I had to head home and pound the sucker out on my bench.

I couldn't retrieve the brass to inspect it but I did visually inspect the remaining rounds and I on a couple I would have liked to see the primer seated a little deeper but it wasn't really out of tolerance but I discarded them anyway.

Next day... two more misfires and the second squibbed the Beretta again. I did get the brass on both though. Primers were well seated (but even if they weren't the firing pin would have seated them upon discharge) but the cartridge was very black and sooty.

The brass was the same brass I've used for months, the Dillon was obviously new to me as was the powder and bullets but one other new item was a new box of CCI primers. A friend of mine that's been reloading for over 20 years now suspects that out all those variables it's most likely a bad primer. Or now a batch of bad primers.

I double checked the seating on the primers and I'm happy with it and again all lengths and weights seem to match the reload guides pretty much in the middle of the range.

Anyone else have any theories? Primers, in my experience are pretty reliable and CCI is not a half bad brand so I'd be surprised if that was it. They were pretty smokey loads but after some research, I found that lead-only bullets will do that as they burn off the lube. My buddy also said that 'Unique' can be a little smokier that some other powders. I wouldn't know... never used it and never used anything other than FMJBT in my 9mm.

So I've got a bit of mystery on my hands... and I hate like heck squibbing a darn fine pistol such as the 92FS. Oh, and I did run my old 9mm ammo (150 rounds or so) without a single glitch so it ain't the gun.
 
I thought that too but since it was my first 150 rounds on a new press... I pretty much was visually inspecting the powder on *almost* every round and weighing every 10 rounds or so. Could I miss one? Sure. Three in 150 rounds... not quite as likely.

On my original Dillon I missed one once in 2,000+ rounds. Didn't have enough juice to barely get the bullet out of the brass. The one that squibbed the other night was a good 1/3rd almost 1/2 way down the barrel. Could a primer-only load send a 9mm that far down the pipe? I just don't know.

Even more worrisome if this press is doing an occasional partial powder fill. But a new press that's sorta like my other one but sorta different and trying to keep an eye on a bunch of moving parts... you could well be right. I'll do up another couple hundred tonight and see. Wanted a bit more powder in the load anyway to see if I can tighten up my groupings on the 50' target.
 
1. is the powder dropping consistently?
2. (if yes) is the powder bad?

I didn't know they made a boat-tail 9mm bullet. For those long range shots?
 
Mr Security -
I'm afraid I'm not exactly able to follow your story. You've mixed in a few hundred extra details that make it very hard to follow.

So you now have 2 Dillons, a 550 and a SDB ?
Which press is in question?
What gun did the failures occur in, the new Beretta ?
And your load was 125gr MBC lead RN, 4.0gr Unique @ 1.105"

Inquiring minds and all.
 
I'd say LOW powder charge.

Lyman #47 shows 4 grains of Unique to be lowest load for 121 grain bullet. So, depending on the bits of random which plague reloaders, I'd say that combination in that firearm was giving the bare minimum pressure to fire the bullet out the barrel. Combined with the sooty cases showing a poor seal of case to chamber walls, I'd say - again - minimum pressure.

Check your loading data, then double check your powder measure and see how 4.2 works.
 
Is the powder measure re-set rod adjusted right?

I haven't tried Unique in my Dillon measures yet but I've read that it ain't suppose to give any problems. Personally, I don't care for it simply because of the way it meters.

Seedtick

:)

:D:D HAPPY NEW YEAR YA'LL :D:D

A little late....stopped to kiss my wife. :p

:)
 
I saw the new year come in while futzing with my Dillon last night. I think I may have partially found the problem..

I dispensed and measured a good 60 loads and sure enough on 2 of them they came in very, very light. And strange how it did it... 4.4, 4.4, then 4.3, 4.2, 4.1 then 2.1 then back on track at 4.4. Odd behavior.

I disassembled every part of the powder measure assembly and powder die, wiped it down with nothing more than a clean, dry cloth, ran my fingers over every surface looking for burrs or irregularities and put it all back together.

Ran another 40 loads and they all measured fine. What exactly was the problem, I don't know (and I hate that). I'll do another 40-60 tonight before I put this press back into production and proceed with any degree of confidence.
 
Yep, all the problems with the new Dillon Square Deal. Always with the new Beretta, always with the new Unique powder that came with the press. My 9mm FMJ (and my bad, not a boat tail on the 9mm... meant that for the 223) ammo on my 550B... never a problem.

I do suspect the comment about the "gummy powder bar" is probably the answer. A COMPLETE break down of all the powder parts and wipe down with a clean, dry cloth seem to have cleared the problem at least for the next 40 rounds.

Mostly, I was testing the settings that were dialed in when I got it. I figured if the guy had 2,000 of these bullets, he had done quite a number of them and he was content with the results. Doesn't mean I would have been... but it seemed a good starting point just to see where this guy was at.
 
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You just discovered the reason I sold my 550b and went to a 650. The Dillon measure doesn't like Unique.

I bought a 550b at one point. Loading ammo on it I was impressed at how well it loaded ammo. This went on for about 5 months. One one of the outings I noticed some of the charges seemed low and some hotter. The next range trip a squib. Happened to me 2 more times.

After the 3rd squib I ordered a Dillon 650 with powder check die and put the 550b up for sale. Never looked back or thought about it till reading your post.

I've talked to others about this and was told that Unique is a flake powder and sometimes it cakes up and doesn't drop. Also talked to people that have loaded it for years with no mishaps on a Dillon.

In the last year I've used up my supply of Unique and switched to Universal.

All I can tell you is good luck.
 
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