Geco factory ammo an almost blow up.
- Thread starter Bavarianbrit
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Bavarianbrit
Well-Known Member
I will have to ask him also which model it is.
HonestJohn
Well-Known Member
The action in the picture is a Mannlicher Schoenauer. They certainly were never chambered in .243, so a custom barrel one can only assume.
Foxyboy43
Well-Known Member
How very odd - I too thought it was a rimmed case!
Photo not that clear but has the case failed just above the head? I can get the case head “flowing” to fill any void caused by a partially closed bolt upon firing (like how could that happen?) but there's a helluva lot of brass to flow to create such havoc with the flash hole and primer pocket - kinda suggests an oversized flash hole/pocket but then how would that ever happen?
Be very interesting to hear what the proof house experts conclude….
Photo not that clear but has the case failed just above the head? I can get the case head “flowing” to fill any void caused by a partially closed bolt upon firing (like how could that happen?) but there's a helluva lot of brass to flow to create such havoc with the flash hole and primer pocket - kinda suggests an oversized flash hole/pocket but then how would that ever happen?
Be very interesting to hear what the proof house experts conclude….
HonestJohn
Well-Known Member
The bolt likely does not close squarely up to the chamber. I think the originals did and a slot in the barrel was cut for the extractor. But if it’s a custom barrel, they may have taken a shortcut and avoided the extractor recess cut, and left a small amount of case between the bolt face and chamber exposed.
Bavarianbrit
Well-Known Member
I will keep all informed with bated breath.
He did have a K98 fully engraved best German gunsmith built last year go off oddly at a chamois which did not react as expected but did expire and when he looked at the rifle the foresight was turned 45 degrees off rom the vertical and he could unscrew the barrel by hand. He is just not a lucky chappie.
He did have a K98 fully engraved best German gunsmith built last year go off oddly at a chamois which did not react as expected but did expire and when he looked at the rifle the foresight was turned 45 degrees off rom the vertical and he could unscrew the barrel by hand. He is just not a lucky chappie.
I think that is perhaps a result of the problem, rather than a cause?
Foxyboy43
Well-Known Member
Aye I get that but for such an increase would the weaker (i.e. the thinner wall) areas of the case not have failed catastrophically first?
Perhaps, for unknown reasons, he has been in the habit of removing the barrels from his rifles’ actions regularly and thus causing these accidents by loose barrels?
It would have had to have somewhere to fail to - and I guess they didn't because it was intact and supported by the chamber wall.Aye I get that but for such an increase would the weaker (i.e. the thinner wall) areas of the case not have failed catastrophically first?
The case-head, however, wasn't adequately-supported for the pressure it was taking - either because the pressure was too high and/or the support inadequate.
Still didn't completely fail, though.
The well-known annular failure of cases above the web is not usually the AFAIK result of too much pressure, but too much stretching - the stretching resulting in thinning of the wall, and failure occurring when the final stretch tears the case-body. While there's brass there with chamber behind it, it stays intact.
HonestJohn
Well-Known Member
Hmm, same gunsmith?
Bavarianbrit
Well-Known Member
DEVA is the German centre for checking and they will no doubt have seen this before. The joke is it was a Geco cartridge in .243 of that I have no doubt about it as he is a Vet and is not daft. But the pressure has smoothed out all evidence headstamp of the originality of the make. Doing forensic on the brass compared to the rest of the pack might be the only way to get to define the maker.
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A .243 Mannlicher Schoenauer need not be a custom job. The GK model was factory chambered in .243, among other modern options.
I've never seen brass fail like this. It looks like it expanded into what should have been the space for a rimmed cartridge. Does the wonder have other M-Sch rifles: i.e., is there any possibility of a bolt mix-up?
I've never seen brass fail like this. It looks like it expanded into what should have been the space for a rimmed cartridge. Does the wonder have other M-Sch rifles: i.e., is there any possibility of a bolt mix-up?
Barrels are not usually easily removed unless it is designed to do so -Muir
Bavarianbrit
Well-Known Member
Interesting I believe he has more of them. I will call him.
I asked him, the barrel was not removed the receiver in the background was a deco off his desk. The Mannlicher model is MC (Monte Carlo). He is also 100% sure the bolts have not been switched.
What are the chances this was a production line failure, and something like a 6x62R ended up in a box of .243?
www.cacciapassione.com
Take a look at the photo in Post 45 in the above thread - I bet that would chamber in a .243 and give you exactly what’s happened here.
The 6x62 Frères - Hunting Passion cartridge
After World War II, the Germans took just twenty years to re-emerge on the market for rifled core cartridges where, in the meantime and for obvious reasons, the Americans had placed their calibers, giving very little space to competitors from old Europe. So in 1965 the RWS presented the first...
www.cacciapassione.com
Caliber 6 x 62 R Freres | Reloading Data
Reloading data for 6 x 62 R Freres cartridges and specifications for cases and loads in this caliber.
www.xxl-reloading.com
Take a look at the photo in Post 45 in the above thread - I bet that would chamber in a .243 and give you exactly what’s happened here.
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Bavarianbrit
Well-Known Member
No way to check what it was as it is now fireformed to .243 dimensions and the headstamp has been destroyed by the firing.
Plus I will bet he does not have such a rare rifle in his gun room (he is an RFD).
Plus I will bet he does not have such a rare rifle in his gun room (he is an RFD).
Not a wise wager for you. The base to the start of the shoulder dimension is 10mm (3/8”) longer for the 6x62 Freres than the .243 Win.What are the chances this was a production line failure, and something like a 6x62R ended up in a box of .243?
The 6x62 Frères - Hunting Passion cartridge
After World War II, the Germans took just twenty years to re-emerge on the market for rifled core cartridges where, in the meantime and for obvious reasons, the Americans had placed their calibers, giving very little space to competitors from old Europe. So in 1965 the RWS presented the first...
Caliber 6 x 62 R Freres | Reloading Data
Reloading data for 6 x 62 R Freres cartridges and specifications for cases and loads in this caliber.www.xxl-reloading.com
Take a look at the photo in Post 45 in the above thread - I bet that would chamber in a .243 and give you exactly what’s happened here.
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