Unusual misfire(s) w/GFL (Fiocchi) deman cases

[Woofie]

Well, I have not seen this before and I have four decades plus into our sport.
I have been reloading deman GFL .308 Win brass that I purchased from American Reloading for a while. I have used up several hundred of these primed, unfired cases so far without adverse incident. It's decent enough brass, clearly not Lapua quality, but it's good for about five reloads and is accurate enough after I've prepped it after first firing.
In first firing, I run a 21st Century expander mandrel into the case mouths then load 'em up as "practice" quality brass. These used a load I've used in these cases for a while.. AA2520 under a Hornady 178 BTHPM, HBN coated.
Same thing happened twice in my Savage F/TR rifle last Monday. Trigger dropped, just a click. Round would not extract with bolt. Used a cleaning rod. Primers popped out of pocket as shown, extractor tore rim off case. I'm a pretty methodical handloader and wondered if I'd forgotten the powder.... Say it ain't so, Woofie! And indeed I had not. After I pulled the bullets there is the powder. Good.
Well... I never claim to be the sharpest pencil in the box but I get there in the end. Went back to my waste brass barrel and sho' 'nuff. No flash hole!
When loading GFL deman brass -- for the first time anyway, I shall henceforth confirm the existence of a flash hole. (With new brass I always debur the flash holes prior to first firing so the absence of one would be discovered then.)
I suspect I now know why these rounds were demanufactured....

 

[Just Say Moe]

Yikes - I'll add flash hole inspection on any bulk/demil brass I come across!

 

[dellet]

Check the base to shoulder measurement on the brass. It’s most likely undersized and creating too much headspace.

it’s one thing to have a primer pop out because of no flash hole. But looking at how far those primers backed out, I would check the other brass dimensions. Or at least measure how far they are proud of the case head, that’s your headspace.

 

[Djfergus]

I've got some gfi deman 25-06 primed brass. Great weight spread on the brass but shot like garbage. Pressed the primers out and they were very loose coming out. Pressed in some Rem 9-1/2s and they were nice & snug. Shot 1/2 moa after that.

 

[Woofie]

Check the base to shoulder measurement on the brass. It’s most likely undersized and creating too much headspace.

it’s one thing to have a primer pop out because of no flash hole. But looking at how far those primers backed out, I would check the other brass dimensions. Or at least measure how far they are proud of the case head, that’s your headspace.

I wondered about that, but in this case I don't think it's headspace. Nice try on getting me to sort through my dead brass bucket again, , but instead I ran some of the 29 rounds left through a Wilson case gauge and they all checked out.
There was little gas leakage evident around the primer pockets based on visual inspection. I think, in this case, after the primer fired, there was little room for the gas trapped in the primer pocket to escape, so, when I opened the bolt, the primers pushed back forcefully enough to tear the rim off the case' leaving the round in the chamber -- that happened in both cases [bad pun] -- which is what we see in the pictures. That's my conclusion based on the evidence, anyway, but I appreciate your suggestion.

 

[243winxb]

The pressure in the primer pocket is calculated to be approximately 23,890 psi, no powder in the case. Higher with a small flash hole. https://discover.dtic.mil/

The shoulder could be set back with no flash hole.

 

[Woofie]

The pressure in the primer pocket is calculated to be approximately 23,890 psi, no powder in the case. Higher with a small flash hole.

The shoulder sbould be set back with no flash hole.View attachment 1291235

Is that Hatcher's Notebook??
Only thing seen in this case was the primer setback and some odd rippling on the case necks, which you can see in the photo posted.

 

[NorCalMikie]

Check the base to shoulder measurement on the brass. It’s most likely undersized and creating too much headspace.

That was my first thought.
Don't think is's a head space issue?
Pull the bullets out "a bit" to a jam into the lands and try them again. Once fired, make sure you don't "oversize" them and end up with the same problem all over "again".

 

[243winxb]

Is that Hatcher's Notebook??

Ggmac emailed the photo to me to post in this thread. Link. Post 31. He thinks-from an old book of a 30-06 Frankfort arsenal. Photo post 40.
Or? The Complete Guide to Handloading , by Phil Sharpe third edition , second revision supplement . Page 48 , beginning of chapter 6 , Primers - Development And Manufacture . .

 

[Rsadams]

Everything needs to be inspected before loading , I've seen some crazy stuff in new brass and in everything else....