Tiny flash holes...

Status
Not open for further replies.
Rule3 said:
But I suppose there are analytical studies on flash hole size in 9mm range brass.:uhoh:
Click to expand...

It's all just about physics.

And an understanding of internal ballistics.

I have a degree in Engineering and was a salesman for high - end Thermocouples...
 
Last edited:
GeoDudeFlorida said:
Why not?
Click to expand...
Indeed. The very thing I’ve been fighting against since I started this hobby. Why not anything and everything?

I just bought a pocket decrimper on the once in a many thousand chance I’ll pick up a case at the range that I just can’t live without but must crimp it first. I even ran several hundred never crimped cases through it to prove to myself they were never crimped.
 
CQB45ACP said:
Indeed. The very thing I’ve been fighting against since I started this hobby. Why not anything and everything?

I just bought a pocket decrimper on the once in a many thousand chance I’ll pick up a case at the range that I just can’t live without but must crimp it first. I even ran several hundred never crimped cases through it to prove to myself they were never crimped.
Click to expand...
ABM All Brass Matters
 
Maybe the problem isn't with the flash hole, it's the decapping pin. There is a lot of variation between die manufacturers. Looking just at my own dies I can see Lyman pins are quite thin. RCBS and Lee are substantially thicker. Like others have said - it went bang the first time and is likely to do so again without any modification. Plus reaming flash holes is just a bit too much case prep time for me. I don't need another step in the process.
 
CQB45ACP said:
Love it. My new yard sign to counter the virtue signaling ones in neighboring yards!
Click to expand...
Yard signs around my neck of the swamps say things like, "U-PIK black/blue/straw/berries --> call ahead" or "Farm-Raised Beef - This Way --> call ahead" depending on the time of year and how the seasons are growing.
 
I think about a time when people will be writing posts about how they wish they had kept all of that Glock-bellied, tiny flash hole, pocket-crimped 9mm/40/45 because now there isn't any more or it's a week's pay for 100 casings... I wonder what they'll call people like me who straighten wrinkled cases and ream primer pockets?
 
LiveLife said:
You don't have to but if you want greater "consistency", I would.

Same for checking finished OAL and chambered OAL for bullets setback. Many don't check it and wonder why their group sizes are not consistent.
Click to expand...
LOL group sizes consistency... Ah well maybe for some people that applies. Any 9 or 45 I put together is cheap plinkers with plated or cast boolits and smoky Unique. Volume and 'goes bang' about covers my requirements.
 
LiveLife said:
You don't have to but if you want greater "consistency", I would.

Same for checking finished OAL and chambered OAL for bullets setback. Many don't check it and wonder why their group sizes are not consistent.
Click to expand...
Many don't check it then blame "Glock belly" or some case-related failure when they get a rupture and hot gas dumped in their mag well. :cuss:
 
CQB45ACP said:
Me too but do you do anything about them?
Click to expand...

I don’t do anything about the larger than normal ones but I have already tested them.

If I had them pulling out decapping pins I would get rid of them or the die. That said, dies like RCBS are going to be more prone to the problem than say, Dillon dies where the pin can’t be pulled out.
 
jmorris said:
I don’t do anything about the larger than normal ones but I have already tested them.

If I had them pulling out decapping pins I would get rid of them or the die. That said, dies like RCBS are going to be more prone to the problem than say, Dillon dies where the pin can’t be pulled out.
Click to expand...
My Lee Universal resizes tiny primer holes to almost normal but leaves a burr on the wrong side of the hole. Two seconds with a flash hole reamer, cleaner, uniformer and it's done.

But, I am NOT a high-volume reloader or a competitive shooter so my focus is on having fun with the hobby and making good, safe, fun ammo for me and my kin and friendly folks to shoot so I don't mind getting to know my cases by first name.
 
For me, 9mm brass is too cheap and plentiful to mess with modifying flash holes or decapping pins. Most headstamps work fine as is.
 
Wow, I didn't know that there was going to be so many worms in the can......

1976B.L.Johns. said:
Was just popping the spent primers out of the sorted brass from others in 9mm Luger.
Click to expand...

Should have wrote this evening after getting home.

Howa 9700 said:
I'm still trying to wrap my head around who carries reloading equipment with them on a bike and stops on the side of the road to use it.
Click to expand...

Could be done......?!?
But I do go to the range for handgun shooting on the Harley.

Thanks for all the responses.
I tossed 'em as this was the first time seeing this problem, just 6, plus I have more 9mm brass than I will ever use.
 
I've never reamed a flash hole, but I will inspect each round for burrs on the inside. 90% of the time, the flash hole has no burrs and I don't do anything. But, 10% of the time, I will see burrs and I will take a drill bit that is just small enough to fit the mouth and chamfer the flash hole. Consistency is what matters, not size (I know you can throw a joke in here).
 
CQB45ACP said:
Why do you say that?

All the WW (Winchester Western) 45ACP cases I’ve seen are large hole.
Click to expand...
It’s a very simple thing to make a small hole larger when working with brass. It’s a very complicated thing to try to make a large hole smaller when working with high pressure fittings.
 
Status
Not open for further replies.

Similar threads

H
  • Locked
F&S 223 REM with tiny flash hole, who makes them?
Replies
12
Views
4K
spitballer
spitballer
B
  • Locked
Flash holes too small on HP 308 brass
Replies
6
Views
1K
Bowfishrp
B
Random 8
T and Norma marked small flash holes 9mm
Replies
18
Views
375
CQB45ACP
C
A
  • Locked
About those flash holes.
Replies
8
Views
537
fguffey
F
N
  • Locked
Enlarging the Flash Hole.
Replies
6
Views
2K
Bart B.
B
Back
Top