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Possibly used a case full of bullseye or something like that; but the bolt should have not cracked in any amount of pressure; should have had a soft core to prevent bolt failure. | |||
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I think that the mini action held very good from the pressure applied. I wish we had more information as this is the first mini that I have seem blown up. When Brownell's had these little actions back in the 80's it listed these actions were of a good alloy steel. Does anyone have the original catalog from the early days? I believe that the heat treatment was about 38 RC which would be strong. Most of the 98 actions were made of low carbon steel and cased hardened. I would like to see more on these MX actions as to how they are heattreated. Has anyone sent a Mark X or Mini Mauser off for hardening again after welding on the top bases? Was the alloy steel determined before the reheattreatment? Just some of my thoughts, Les | |||
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Really only proves that a moron can find away to blow up anything. Had s gunshop in Lafayete CA many years ago. Stumbler bought a 7mm Rem Mag...Came back a couple days later, in spite of not even a scratch, had a "lawsuit mentality". The rifle, (an FN) was ALMOST destroyed)..much like photos but no split bolt. We took off the barrel since the bolt was impossible to open. After prying out the case head,. headstamp was still visible "308 Win" | |||
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There ought to be a law against uncommon stupidity. Great spirits have always found violent opposition from mediocre minds. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence. Albert Einstein Better living through chemistry (I'm a chemist) You can piddle with the puppies, or run with the wolves... | |||
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Or Blue Dot  http://s721.photobucket.com/al...?albumview=slideshow NRA Life Member, Band of Bubbas Charter Member, PGCA, DRSS. Shoot & hunt with vintage classics. | |||
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A person puts the wrong powder, the wrong charge or the wrong cartridge in a gun and it becomes a pipe bomb and will act accordingly. It will crack and split in places you wouldn't expect. A lot of folks don't understand the power behind a ruptured case. At the least it will split the stock and mangle the bottom metal. At the worse it can do this:  The top of the receiver and scope were never seen again. Can anyone tell me what caused the problem based on this photo? The gun was a 300 RUM.  That's the owner holding the barrel. He should have been awarded at least a bronze medal for that skating performance.  That little Mauser is a fairly tough action. There had to be some Hellacious pressures involved in that mishap. _______________________________________________________________________________ This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life. | |||
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Excess pressure. Frank "I don't know what there is about buffalo that frightens me so.....He looks like he hates you personally. He looks like you owe him money." - Robert Ruark, Horn of the Hunter, 1953 NRA Life, SAF Life, CRPA Life, DRSS lite | |||
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Westpac The case wall appears to be rather thick in the photo. Hinting that they fired a belted magnum round, probably .300 Win Mag or 300 Wby. Craftsman | |||
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The two piece bolt looks like it survived... Mike Legistine actu quod scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.  What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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No, it was a factory round. Notice how drastic the bevel is at the mouth of the chamber? It was determined that the factory bevel was so great as to provide no support at the critical web area of the case. As great as that bevel appears in the photo, in person, it is even worse. Winchester is guilty of cutting similar bevels in some of their PF stuff. FWIW, folks who suspect an excess amount of bevel at the mouth of their non-belted chambers should have it looked at by a competent gunsmith. Yeah Mike, that bolt is relatively unscathed and still in it's locked position. Weird! _______________________________________________________________________________ This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life. | |||
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Malm, I had the exact same situation with a Win. M70 pushfeed in 220 Swift. Customer had the blow-up on the 15th round through the rifle. At first we had no clue. Upon examining the barrel we discovered the excess bevel. The customer returned to the shop with another M70, purchased in the same time frame, that also had this excess bevel. I set the barrel back and rechambered it for him. When the customer contacted Win./Browning, with good close up pictures of both rifles, they offered him a choice of any currently produced firearm. NRA Patron Life Member Benefactor Level | |||
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Exactly! No case head support.  Doug Humbarger NRA Life member Tonkin Gulf Yacht Club 72'73. Yankee Station Try to look unimportant. Your enemy might be low on ammo. | |||
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I just looked at a post-64 M70 PF .270 Win I've got in for repair and it exhibits a deep bevel! | |||
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The guy with the rifle Westpac pictured should thank his lucky stars that he was shooting a Savage 110 series rifle as this design has some of the best gas handling properties of any rifle. The gas blew the front baffle clean off and grenaded the action but the rear baffle is still in place. Looks like Mr. Brewer's concern for gas handling saved this guys face and probably his life as well. I shudder to think what would've happened had this guy been shooting a pre-64 M70! | |||
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Looks like a poor attempt to do some explosive bonding !That's one way to bond dissimiler metals . The possibility for production screw-ups are endless.  | |||
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Makes me a little concerned about stuffing a .338 Lapua in a 112 www.KLStottlemyer.com Deport the Homeless and Give the Illegals citizenship. AT LEAST THE ILLEGALS WILL WORK | |||
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That mini mauser bolt was not case hardened; it was through hardened; the failure exhibits characteristics of being hard; it cracked where it should have stretched. Note that Savage bolt; no cracks. And it is not so much the pressure that makes these failures; it is the escaping gas that does the damage. Chrome moly steel can take some very high pressures. In our 120mm tank cannons, the operate at around 100,000 psi, but have a steel case base and rubber seal, and a steel primer that is screwed in. The brass case is the weak link and as stated, when it fails, like from a too aggressive bevel, bad things happen. Back to the mini mauser; the bolt was heat treated too hard, too deep. | |||
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Had the receiver not come unglued, effectively venting the majority of the forces away from the bolt, one doesn't know what would have happened. Lucky for this guy the Savage had great gas handling capabilities. _______________________________________________________________________________ This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life. | |||
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The Mauser in the first post was a 7.62x39 & this is what done it in:
See the thread in Walter's forum. | |||
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Let's see 23.4 AANo7 instead of reloader 7. Heck that is only around 133,000PSI. Just 2.6 times the normal pressure. As usual just my $.02 Paul K | |||
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I had a marine kid in Hawaii load 39gr Bullseye into a Rem 600 chambered to Mr Ken Waters 263 Express[todays 260 Rem]. Luckily the cases were fire-formed Lake City NM 308. Bolt locked, dogleg handle flew off. Case was "welded" to the bolt face. Never found the primer,ejector or extractor. Had to pull the barrel[still good-McGowen]drive the bolt back through the receiver and it swelled to .740 at the front. Tim McCormick said he guesstimated pressure and 160,000-180,000. I still have the bolt if anyone wants pictures and the rifle is still in the field with a different bolt and barrel. Funny thing was~ When it went off it didn`t go boom or anything?? Just a rather sharp pop--like a firecracker--Go figure? Aloha, Mark When the fear of death is no longer a concern----the Rules of War change!! | |||
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