Bavarianbrit
Well-Known Member
Slamfire?
Remington 7400 boom.
- Thread starter Bavarianbrit
- Start date
Rookandrabbit
Well-Known Member
Wow it’s even buckled the receiver lucky for him that held together! Very fortunate young man to still be in one piece
Foxyboy43
Well-Known Member
Hmmm.
Nothing quite as spectacular as a gun self-destructing! Always amazes me how many shooters walk away uninjured apart from mental scarring and the occasional life-long flinch!
Old time reloader had his .44 magnum “let go” in the bay next to mine many years ago. A memory I won’t forget in a hurry; upon hearing the detonation I cautiously peeped round the dividing baffle and in the cloud of smoke saw this outline of a man still with his arm outstretched in the firing position clutching the pistol grip and top strap of his revolver. The rest was up the range or buried in the dividing baffles either side of him - old-time reloader with an “if you can seat the bullet with one hand it needs more powder” approach. Got away without a mark on him and considering the force of the home-loaded hand grenade that went off in his outstretched hand perhaps two feet from his face, it was quite remarkable that he wasn’t maimed and/or blinded.
Nothing quite as spectacular as a gun self-destructing! Always amazes me how many shooters walk away uninjured apart from mental scarring and the occasional life-long flinch!
Old time reloader had his .44 magnum “let go” in the bay next to mine many years ago. A memory I won’t forget in a hurry; upon hearing the detonation I cautiously peeped round the dividing baffle and in the cloud of smoke saw this outline of a man still with his arm outstretched in the firing position clutching the pistol grip and top strap of his revolver. The rest was up the range or buried in the dividing baffles either side of him - old-time reloader with an “if you can seat the bullet with one hand it needs more powder” approach. Got away without a mark on him and considering the force of the home-loaded hand grenade that went off in his outstretched hand perhaps two feet from his face, it was quite remarkable that he wasn’t maimed and/or blinded.
alberta boy
Well-Known Member
jthyttin
Well-Known Member
If it was slamfire, the round that ignited out of battery was round number 9 i.e. third round for the young chap. This should be quite easy to check if evidence was gathered carefully. I.e. how many rounds were loaded to mag, and how many unfired rounds were left.
The breech was open about one centimeter (length of 30-06 neck, looking at pic that compares two cases) when the peak pressure occured. So basically something stopped the round during the chambering and then it ignited for some other reason.
E.g. crooked bullet might have prevented full chambering, or some other obstruction that might have moved from the receiver to the chamber. Ignition is another issue, I'm not familiar with 7400 trigger mechanism but hopefully it's not designed to release hammer if breech is not closed.
The breech was open about one centimeter (length of 30-06 neck, looking at pic that compares two cases) when the peak pressure occured. So basically something stopped the round during the chambering and then it ignited for some other reason.
E.g. crooked bullet might have prevented full chambering, or some other obstruction that might have moved from the receiver to the chamber. Ignition is another issue, I'm not familiar with 7400 trigger mechanism but hopefully it's not designed to release hammer if breech is not closed.
alberta boy
Well-Known Member
It can if the firing pin is broken , it's happened a few times over the years . I've seen it happen in a 760 Pump as well .
AB
Smellydog
Well-Known Member
What happened to the 760 ab?
alberta boy
Well-Known Member
The firing pin was broken and lodged in the bolt face . When the owner pumped a round in , he had an out of battery detonation . He wasn't hurt , but the rifle was destroyed . It's far from common . To be honest , it's the only occurrence I know of in a 760 .
AB
Smellydog
Well-Known Member
It's all just speculation I guess, we will never know the truth of what really happened.
If I were a betting man my money would be on ammunition over a broken firing pin.
Only because I had a S&B round blow a primer pocket of a 222 round once and occasionally hearing similar stories from that producer.
jthyttin
Well-Known Member
Look at the picture comparing the two cases. The broken case hasn't been fully chambered (about one centimeter short) when it has been molded to chamber dimensions i.e. maximum pressure has occured. If there had been enough force after ignition to break the breech, I will bet good money the case hadn't been moving one centimeter rearwards under that pressure (and if it had, it wouldn't have stopped at one centimeter)
kenbro
Well-Known Member
My Win M12 does it all the time if required.
Ken.
jthyttin
Well-Known Member
Yes but it's intentional design feature, even though some silly people call it slamfire.
There's separate mechanism that holds the hammer back until breech is closed. Otherwise keeping the trigger pressed while cycling the action would result in hammer follow (since the trigger mechanism itself is designed not to keep the hammer back if trigger is being pressed while cocking).
There's separate mechanism that holds the hammer back until breech is closed. Otherwise keeping the trigger pressed while cycling the action would result in hammer follow (since the trigger mechanism itself is designed not to keep the hammer back if trigger is being pressed while cocking).
Judging by the point at which the case has let go, it was clearly unsupported at that point forward of the web when it detonated.
Can only happen if somehow the primer is struck before fully chambering or struck, hang fire and then it goes off part way through ejection.
lucky guy as fingers and thumbs could easily have been in the way
Can only happen if somehow the primer is struck before fully chambering or struck, hang fire and then it goes off part way through ejection.
lucky guy as fingers and thumbs could easily have been in the way
I have a box of shame of ammo brought in from customers
it includes all the major producers.
One so hot the brass flowed deep into the ejector groove in the bolt face that it will no longer stand up on a flat surface!
case splits, blown primers, warped necks, bulged sidewalls, marked primers, rust, water damage .....
Smellydog
Well-Known Member
Sure, had a few myself.
Re the case in question I think it drastically transformed once the locking mechanism let go but that's just my speculation. I fail to see how high pressure could be developed to the obvious clear amount by firing out of battery.
Cartridges don't detonate out of battery. It's full of propellent, not explosives.
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