August 29, 2013, 07:32 AM | #1 |
Member
Join Date: August 21, 2013
Posts: 56
|
How much pressure?
Does it take to do this to a case? Thats a spent large rifle primer out of a "normal" pressure .270 in the pocket.
I posted this on another forum some time ago, but I feel that it is a good example of why reloading should be taken VERY seriously. I was working in a local gun store about 4 years ago and a man brought in a Remington 770 rifle in .270 with the bolt broke off of it. First question was how he broke the bolt. He broke it trying to HAMMER it open. Seems he was testing some reloads and got a lot more BOOM than he was expecting. According to him there was way more noise and recoil and lots of smoke came out of the action. The red flags started going up when he couldn't tell us what kind of powder he was using or how much. We figure he got the right amount of the wrong powder rather than too much of the right powder. It took us quite some time to get the action open and then pry the case out. No primer was found. The gun was sent back to Remington to see what could be done and it came back within the month with a new bolt and a letter stating that it had been fitted with a new bolt, tested and approved for use. We were shocked that it was approved for use after that, but he picked it up, shot it and later told us that it did fine. A few more shots of the case for comparison. Both cases are .270s. One side by side of the primer pockets (note where the case flowed into the ejector and the size of the flash hole) and the other side by side of the case head. |
August 29, 2013, 10:06 AM | #2 |
Senior Member
Join Date: July 28, 2007
Location: Ohio
Posts: 11,753
|
Scary.
__________________
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss. |
August 29, 2013, 11:34 AM | #3 |
Senior Member
Join Date: December 4, 1999
Location: WA, the ever blue state
Posts: 4,678
|
I have done that sort of thing many times.
If you plug the load into Quickload it will say something like 100,000 psi or 110,000 psi to get the primer pocket to expand that much. The pressure does not matter, it is the effects of pressure. You probably can't say "No harm done." because if you keep doing that you will see gas cutting and/or lug set back.
__________________
The word 'forum" does not mean "not criticizing books." "Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist. Are we a nation of competing ideas, or a nation of forced conformity of thought? |
August 29, 2013, 05:34 PM | #4 |
Senior Member
Join Date: May 27, 2007
Posts: 5,261
|
An employee at a gunstore told me one. A rifle shooter buys a 38 Special Colt Police Positive. He asks for a good load, the owner writes down something like 158 L 3.0 grains Bullseye. The rifle shooter sees that the case has very little powder inside and decides, clever man, that there is a decimal point off, or something. After all, most rifle loads reach the case neck.
First shot at the gun range attached to the gun shop, the cylinder bursts and the top strap embeds itself in the overhanging wooden roof. Rifle shooter goes into store claiming the pistol is defective, wants another, for free. After a little bit of reloading discussion owner finds out just how much Bullseye was put into the case and tosses rifle shooter out of the shop, without a free pistol. I heard the top strap was never removed from the range roof.
__________________
If I'm not shooting, I'm reloading. |
August 30, 2013, 11:19 AM | #5 |
Senior Member
Join Date: January 8, 2008
Posts: 803
|
That makes my teeth hurt to think about what the recoil was like on that shot....
|
August 30, 2013, 03:28 PM | #6 |
Senior Member
Join Date: September 28, 2008
Posts: 10,442
|
They're out there.
A fellow did exactly that with a .357 revolver, right next to me at the range. The top of his frame went through the roof, too. Fortunately, somehow nobody was hurt. Another fellow got a case stuck in his rifle. When asked about his reload, the type and amount of powder, his reply was something like, "You know, gunpowder, filled the case with it."
__________________
Walt Kelly, alias Pogo, sez: “Don't take life so serious, son, it ain't nohow permanent.” |
August 30, 2013, 06:35 PM | #7 |
Senior Member
Join Date: August 4, 2005
Posts: 2,017
|
I'll freely admit almost everything I've done reloading-wise for years has no book data--I've developed things that there just isn't data available for. AND, I haven't blown up ANYTHING. Have some pretty impressive/crazy data to show for some of it. There is always a serious method to my madness. NOW, there are OTHERS who I wouldn't trust to load an office stapler, much less reload ammo...
__________________
"Why is is called Common Sense when it seems so few actually possess it?" Guns only have two enemies: Rust and Politicians. |
August 30, 2013, 07:20 PM | #8 |
Senior Member
Join Date: December 14, 2004
Location: Northern Indiana
Posts: 6,117
|
Thanks for sharing those photos. My first rang session at a private club I wanted to become a member. Had to show my ability and safety.
Standing there when the range officer said clear to fire. I remember getting hit in the face with a hammer. Glasses are gone, nose is broke, and blood in the eyes. Guy next to me on his 3rd round, his AR blew up. Had the fore end in one hand and the grip in the other and nothing in between. They confiscated all his gear and inspected it. Their best guess was a case full of pistol powder, I never heard what powder. Had over 50 in his bag with the same flake powder. Never got to see the case that blew up in gun but I wonder if it looked like the one in your photos. By the way, what broke my nose was the T charging handle of the AR.
__________________
It was a sad day when I discovered my universal remote control did not in fact control the universe. Did you hear about the latest study.....5 out of 6 liberals say that Russian Roulette is safe. |
August 30, 2013, 07:55 PM | #9 |
Member
Join Date: August 21, 2013
Posts: 56
|
The hardest part of the whole thing was getting the bolt out of that gun!
If I remember correctly, we wound up drilling the remainder of the original bolt handle out and using a piece of stainless rod of the same diameter to finally rotate the bolt enough to unlock it. Then we had to basically hammer the bolt and case out of the action. The case head had completely flowed into the recess in the bolt face and had to be pried out! When we came out of the back room once we got it all apart, I remember looking over at the guy and saying "God must love you to give you the guardian angel he did!" |
August 30, 2013, 09:07 PM | #10 |
Senior Member
Join Date: July 26, 2011
Location: USA
Posts: 1,730
|
Proof loads are 93,000 PSI for the 270 Win. Your a lot higher.
|
August 30, 2013, 09:16 PM | #11 |
Senior Member
Join Date: August 1, 2007
Location: Tabor City , NC.
Posts: 1,969
|
What he ^^ said .
I`ve seen cases go to 70k 3 times before loose primers showed up , so I`ll say double & a bit 150k psi.
__________________
GP100man |
Thread Tools | Search this Thread |
|
|