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Under size flash holes in 9mm brass?

5.9K views 63 replies 17 participants last post by  Nitro.45  
#1 ·
After not reloading for over 23 years and with no place to set up my Dillon RL550B, I dragged out my Hornady 007 and after freeing up the stuck ram, I installed my Lee Carbide 38 Super DE capping die and started punching out spent primers. After finishing up the 38 Super brass, I started De-capping 9mm. After a few rounds, the pin slides up and I look inside to make sure I did not get any Berdan primer brass, but the flash hole was extra small. I measured the holes in my other brass and found the holes to be the same size as a #47 drill. I drilled out the undersize flash holes in several and the 9mm went through the die with out a problem.
Has anyone else run into undersize flash holes?
 
#7 ·
Yah like the others said probably Norma brass. I hate the stuff, it kept pulling my de-capping pins out. I fixed it by knurling the top of the pin so it would stay in the collet. Depending on you die, if you have the headed pin Dillon sent me a bunch of smaller headed pins, think they were RCBS, they measure .074".
The first time I ran into this was with Speer 357Sig brass and they had holes so small it would break my pins.
 
#8 ·
I think that the small holes are made for a reason, for example S&B has small holes on their 9mm non tox brass but normal holes on their other 9mm brass.

It could be as easy as trying to standardize on something that will work well with both non tox primers and standard primers.

Lee decapping pins will push them out and as the pin is slightly conical it will resize the holes to work with in the Dillon decapping pin the next time.
 
#10 ·
I have noticed the primers in Norma 9mm brass take more effort to remove on my 550. But to be honest, I have not looked at the brass since decapping. I will remember to check. I actually sorted them all out after several because I did not want to risk breaking a pin. These are late model carbide dies if that makes a difference.
Thanks for the heads up!
 
#13 ·
Do the undersized flash holes in the Norma seem to be found in their other cartridges other than 9mm ?


During the BLM riots & covid era Norma was one fo the few ammo companies whose stuff could found in stock.

I picked up some of their .223, .45acp, .308Win, .243Win over the last couple years....with the plan of having some decent brass to reload afterwards.


Good to know the SD pins & FW Arms decapper will work and make it user friendly brass.
 
#15 ·
Do the undersized flash holes in the Norma seem to be found in their other cartridges other than 9mm ?
I have only encountered it in 9mm but now that you ask- I don't recall picking up any other calibers... and it's all the newer style headstamp with the updated font.

It's good brass though... a little elbow grease on the 1st decap and it's ready to go.
 
#14 ·
I've run into a few pieces of 9mm brass that hung up on my depriming pins. I believe I've run across more than a few 5.56 as well. I don't remember the brands though. From time to time I'll deprime brass while watching movies I've previously seen. And I usually use the Frankford hand held deprimer. I believe it uses the Lee pins but haven't broken any yet. Unlike in the presses. I've "found" a couple pieces of Berdan brass the hard way.

Image


Jon.
 
#22 ·
The new Norma 9mm brass has a notably, smaller flash hole. However, a stout decapping pin takes care of them pretty easily.
More likely it’s being made by a [new?] “third-party “manufacturer
@Nitro.45, while it is possible the manufacturer changed the flash hole on purpose, I would guess it has more to do with worn tooling.
 
#25 ·
we need to install massive punch capable decappers, someone will make them!
I don't think mine is anything special- I just have a squirrel daddy pin in the Lee Univ. Decap die... it's pretty tough- it even brakes up rocks in the ETTS brass that I miss. ...lol

Another benefit to decapping ahead of wet tumble. I think the Norma's would cause you to stop down on a progressive press, if nothing else, but to investigate the resistance.
 
#33 ·
Dillon rep tells me that those primer flash holes are not to SAAMI specs. While I have not had a problem yet Dillon rep says "would not be a bad thing to have spares" So I'm gonna order a few and then run 100 Norma cases and find out. What I am curious about is whether or not the hole ends up a clean punch through or not. I will look very closely after a couple are decapped. Any one with any insite on the finished flash hole?
 
#34 ·
The metal displaced has to go somewhere and most likely flare out. As long as the flare out does not mess with the anvil in the primer, it should work.
Having converted Berdan to Boxer by drilling a new flash hole, I used a #47 drill to fix the small flash hole. Hole stamping dies use heat treated D-2 for the stamping pins.
 
#35 ·
I have encountered this within the last couple years with some factory 9MM RUAG 124 grain FMJ "SX" ammo that came in a white box. The case head is stamped with a T and 9X19 SX. LOT number is T-20-013. Don't know what the "SX" part means. Tiny flash holes that seemed to raise pressures, i.e., leaking primers, etc. Box is marked Switzerland.
Nevermore.
 
#45 ·
Got home from work this morning......parked my butt in the recliner with the dog laying on my knees....had the news on, trying to catch up on the goings on in the world....I've been oblivious the past three days.



Screwed in this new porn star decapper into the Lee handheld press that lives on the chair side table and got into some .45 acp range brass.

Decapped ~250 rounds and was astounded to find 25% of it was small primer pocketed freakshow brass. Dangitman......who knows....perhaps this spp transgender .45acp stuff will accumulate enough in my stash to make it feasible to make SPP runs on occasion.

The timing of having suitable accumulation to run a spp batch will likely coincide with LPP hitting the market again....story of my life. :ROFLMAO:
 
#47 ·
At least until I have a lifetime supply for my son!

As for SP/LP brass on this trip- not real keen on dropping the good stuff out of state. However, I'm even less keen on getting hit with your sorting hammer so I packed a few boxes of LPP 45 in case you and I shoot next to each other on the line... ;)