Category: Ejector marks ballistics

31.10.2020 By Kilmaran

Ejector marks ballistics

The State was wrong. If you look at the comparisons, you will see that what the State had, proved nothing. The State claimed it found two lead cartridges in Diane's rifle, the morning after the shooting, which were later microscopically compared to casings found at the shooting site and in Diane's car.

If you look at those two lead bullets carefully you will notice these discrepancies:. The tool marks from the apartment didn't match those from the shooting site. All the other cartridges in her rifle were copper copper wash. The State was looking for lead cartridges, because that is what was surgically removed from the victims, so that's what they found. Look at the comparisons:. He started by evaluating each piece of evidence, bullet, casing, or cartridge. The bullet is the projectile, the casing is the empty cartridge, and the cartridge is the bullet and casing totally intact with the gunpowder inside.

Murdock would then establish the validity of each piece. This, according to his notes, involved noting the degree or depths of each tool mark in regard to actually being able to make literal comparisons with other such evidence. He lists each identifying number, such as E3, E4A, etc. Murdock's notes page All casings from the shooting site, the road and the car were exactly the same, extractor mark 3 o'clock, ejector mark o'clock. The cartridges allegedly taken from Diane's rifle are listed in a glaringly different manner.

E14A is noted to have one extractor mark and no clear ejector mark and E14B is listed as well defined extractor mark and one fairly well defined ejector mark, "close to the extractor mark," The description changes.

It's not 3 o'clock and o'clockbut now it's "close to extractor. What happened to the definitive comparisons? The answer is, the bullets from the apartment didn't compare to those from the shooting site. This would mean the comparison between E14B which has extractor marks close to the ejector marks does not match with E3, E4A, E4B, E5, E6A and E6B because their markings, which are at 3 o'clock and 8 o'clock are not close together.

The next thing we find about E14A is that it has been taken apart, and the bullet removed from the casing, for gun powder comparison. See: Murdock's notes page No lab reports are available and no one testified on these extremely important gun powder tests. If the gun powder from Diane Downs' rifle had matched that of the gun powder residue from that night, you would have heard about it, but you didn't.

The bullets taken from Diane's apartment did not match the bullets from the shooting site, because the gun powder didn't match. Now look what happens, the bullet that was taken apart is no longer E14A. Look at the diagram below. It shows E14A intact and E14B disassembled. What were they drinking anyway? He says: "A reason has caused me to reconsider the id - it seems to fall apart at 4x the object No time.

On June 28,photos were taken of the comparisons between the casings involved in the shooting and cartridges "found in Diane's rifle". The casings empty cartridges from the shooting site, and the two lead cartridges, bullets are intact allegedly taken from Diane's rifle at her apartment are listed below.

Each labelE3, E4A, etc.Forums New posts Search forums. Articles New articles New comments Series Search articles. Everywhere Threads This forum This thread. Search titles only. Log in Register. What's new. Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.

Ejector Marks on Lower Loads? Thread starter samson Start date Sep 22, Good Morning. I have a Christensen Arms Ridgeline in a 6. This is at. This seems a bit low for a charge listening to others and what they are shooting. I ran it thru a Magnetospeed and is showing fps.

No Hard Bolt Lift but a bit of cratering in Primer. I believe this is due to the larger opening of the firing pin. Any suggestions? Rardoin Well-Known Member. Did the bolt feel a little stiff on opening? Try wiping down a cartridge with a little alcohol or brake cleaner on a rag and swab the chamber with the same then shoot a round or two and see if the ejector mark is lessened.

The bolt lifted OK. I will wipe them down and see what happens.

ejector marks ballistics

If you are not getting stiff bolt lift you are not likely having pressure issues.Forums New posts Trending Search forums. Media New media New comments Search media. Feedback View Statistics. Resources Latest reviews Search resources. Members Current visitors.

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Search Advanced…. Ejector mark on Brass. Thread starter jackinfl Start date Aug 9, JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Dec 19, 49 Fort lauderdale, Fl. My son and I shot yesterday.

It rained on us. Guns got wet, ammo got wet. I noticed several pieces of brass had round marks on the back of the case near the rim. His gun is Factory mine has been worked by GAP. What are these makes caused by? Jan 22, 3, 5 0 54 Dallas, Texas www. Re: Ejector mark on Brass The ejector marks are caused by excessive pressure. When ammo or the chamber area of a rifle gets wet and a round is fired, the moisture in there causes an increase in pressure.

ejector marks ballistics

It has to do with water trying to be compressed. Keep the ammo and chamber area dry and you'll be ok. We have seen this problem in shooting matches when guys run a max load. When their ammo gets wet, their hot load is now excessively hot, and causing all kinds of problems. Jul 26, 2, Ventura Cty, CA.

That results in increased thrust from the casehead onto the boltface. Re: Ejector mark on Brass Chad, Thanks! Is this brass OK to reloaded? Tripwire Private Belligerents. Jun 18, 6 1 0 54 VA. Pronounced, or do you gotta hold 'em in the light just right to see 'em? Find out if your primer pockets are loose or not; and if you want, measure the pressure ring compared to a known case fired "dry". If the pressure ring is bigger then the brass is likely bad.S triated action marks are common to cartridge cases that have passed through the action of an auto loading or repeating firearm.

Striated action marks can be produced on cartridge cases by contact with a number of different areas within the firearm. Some of the more common striated action marks include chamber marks; shear marks, firing pin drag marks, extractor marks, and ejector marks. One of the most common striated action marks are called chamber marks.

ejector marks ballistics

Roughness in the chamber of a firearm can scratch the outer walls of a cartridge case when loaded and removed from the chamber. Most chamber marks occur after the cartridge is fired. Cartridge cases expand when fired pressing out against the walls of the chamber. When they are pulled out of the chamber, the sides of the cartridge case can be scratched. The comparison image below shows chamber marks on 22 caliber, rimfire cartridge cases.

Another common striated action mark are shear marks produced by GLOCK pistols on cartridge case primers. GLOCK pistols have a rectangular firing pin hole below in their breech face. When a cartridge case is forced backwards from recoil the primer imbeds itself in the firing pin hole. As the slide of the pistol starts to recoil, the barrel will drop slightly as the action opens. The dropping barrel forces the cartridge case to move down slightly and when this happens the lower edge of the imbedded primer is sheared downward and out of the firing pin hole.

The resulting striated marks can be seen in the comparison image below. In a similar process, striated marks called firing pin drag marks can be produced. When the firing pin springs forward to strike the primer of a cartridge, it may remain slightly forward and imbedded in the primer. The cartridge case drops with the barrel causing the nose of the protruding firing pin to drag across the primer as it leaves the firing pin impression.

Another action mark, usually found in a striated form, are those created by the extractor of most auto-loading or repeating firearms. The extractor is a small part sometimes resembling a hook that is used to remove a cartridge or cartridge case from the chamber of a firearm.

The image below shows the extractor of a 9mm GLOCK pistol hooked into the extractor groove of a cartridge. As the slide of the pistol moves to the rear, the extractor pulls the cartridge case along with it until it is ejected from the pistol. The extractor may or may not leave an identifiable mark on the cartridge case. This is true if the cartridge is fired or simply hand chambered and extracted without firing. Extractor marks may look like those seen in the comparison image below.

As described above, the extractor pulls the cartridge case out of the firearm's chamber.I mpressed action marks, with a few exceptions, are produced when a cartridge case is fired in a firearm. The two most common impressed action marks are firing pin impressions and breech marks. As mentioned at the end of the Striated Action Marks page, ejector marks can also be in the form of an impressed action mark.

Firing pin impressions are indentations created when the firing pin of a firearm strikes the primer of centerfire cartridge case or the rim of a rimfire cartridge case. If the nose of the firing pin has manufacturing imperfections or damage, these potentially unique characteristics can be impressed into the metal of the primer or rim of the cartridge case.

The comparison image below shows the firing pin impressions on two centerfire cartridge cases. As you can see, the firing pin impressions have both circular manufacturing marks and parallel marks from a defect in the nose of the firing pin. The comparison image below shows firing pin impressions on two rimfire cartridge cases.

Imperfections in the surface of the nose of the firing pin consistently produced these impressed marks. Firing pin impressions also can be found on live cartridges. One of those few exceptions I mentioned earlier. In some cases, the firing pin may miss the primer of a cartridge or fail to strike the primer of a cartridge with sufficient force for it to discharge.

The cartridge may also misfire due to a contaminated or deteriorated primer compound. For whatever reason, the result will be the presence of a firing pin impression on the cartridge case of a live cartridge. This could be significant if the cartridge is say, left at the scene or found at a suspect's house.

The comparison image below shows light firing pin impressions on an evidence cartridge case left and a test standard from a suspected firearm right. By far the most common impressed action marks on cartridge cases are breech marks. Most fired cartridge cases are identified as having been fired by a specific firearm through the identification of breech marks.

Ejector Marks on Lower Loads?

Very high pressures are generated within a firearm when a cartridge is discharged. These pressures force the bullet from the cartridge case and down the barrel at very high velocities.

When a firearm is discharged, the shooter will feel the firearm jump rearward. This rearward movement of the firearm is called recoil. Recoil is for the most part caused by the cartridge case moving rearward as an opposite reaction to the pressures generated to force the bullet down the barrel.

When the head or base of the cartridge case moves rearward, it strikes what is called the breech face of the firearm. The breech face rests against the head of the cartridge case and holds the cartridge case in the chamber of the firearm. When the head of a cartridge case slams against the breech face, the negative impression of any imperfections in the breech face are stamped into either the primer of the cartridge case or the cartridge case itself.

The image below shows the primer of a shotshell fired in the above shotgun.

Best Caliber for 1 Mile

Breech marks come in various forms. Those seen above are called parallel breech marks. Obviously, because the marks are a series of parallel lines. Another form of breech marks are circular breech marks like those seen in the comparison image below. Breech marks can also show no obvious pattern. They may have a stippled or mottled appearance as seen below. Now back to ejector marks. Ejector marks are sometimes created when cartridges or cartridge cases are ejected from the action of a firearm.

Ejector marks can be either striated or impressed but the impressed ejector marks not only can be used to identify a cartridge case as having passed through a firearm's action they can also be an indication that the cartridge case was fired in the firearm.

Ejector marks like those seen below could only be reproduced when the cartridge cases were fired in the firearm and not by simply hand chambering and ejecting a live cartridge. Additional examples of cartridge case comparisons can be seen in the image galleries.Just wanted to say we had a really lovely time on our 'grand tour' of the Highlands and Islands.

We hadn't realised how many mountains Scotland had. And how beautiful the scenery. All our accommodation was great. Thanks for organising it. I booked this trip within 3 weeks of our arrival during the height of the summer season in Iceland. Since it was a self-driving tour, I was not sure if it would be worth it given the price.

I did not have time to research nor to book hotels, nor did I know what was realistic as I had been able to research options.

With it all arranged by Margret Wendt, the stops highlighted and the book, it made it very easy to see many sights in a day and piece of mind to know we had a place to stay. From our first encounter with Margret, she captured all the details and requirements for us, which she summarized back in an email, then crafted a great tour on short notice.

We were able to spend our time touring and experiencing everything (12-14 hours each day) rather than on the internet researching and stress of trying to find accommodations. So much to see ,so be sure to plan a lot of days if you are active and want to include additional activities (i. When we needed assistance, change of plans or had questions, the Nordic team was responsive and helpful any time and any day. Very easy to find contact info. The hosts at each location were incredibly welcoming and made our stay wonderful.

Our contact at Nordic Visitor, Christoph, was thorough and helpful in accommodating needs for our trip and was a great help in planning the trip. I am thrilled to use Nordic Visitor for my Scandinavian travels. This was our third tour using the company and I can't rave enough about how great the trips have been. I recommend Nordic Visitor to all friends and colleagues interested in traveling to supported countries.

Ejector mark on Brass

Excellent communication with our advisor. All the documents were very professionally produced and extremely helpful in providing us with the best advice regarding routes and attractions. Generally a seamless experience. I would highly recommend Nordic Visitor for those planning self drive tours in Iceland. This trip was above and beyond. I'm not used to being on a guided tour, but I was pleasantly surprised.

The next trip I do, I would probably prefer a private tour, but either way this trip to Iceland was amazing. Iceland is not only a wonderful country to tour with friendly people but the services and detailed personal itinerary provided by Nordic Visitor, made our visit one of those lifelong memorable occasions. The spiral bound notebook and vouchers were great. I wish the large book could have been made available before the trip as didn't want to spend the trip reading up on the various sites, but would have liked to have that information prior to coming to Iceland.

The gps unit provided with the rental car was rather dated and difficult to use. We mainly just used it to be sure we were on the correct road - so it was valuable in that respect.

Appreciated that the driver was there on time to pick us up from the airport (he also gave us helpful hints about driving in Iceland) as was the transport from Thrifty to take us to the car rental.

We booked this tour of Iceland as our honeymoon. Most people in the USA book tropical vacations, however we wanted something adventurous and more memorable. Iceland and this trip exceeded our expectations in every way.

The country is incredible and words cannot describe its beauty. We were so thankful for the maps and printed out information. This was the trip of a lifetime and if money permits, we'd LOVE to come back someday.MORE BXAAR placed last start at Ascot and has two placings from three runs this prep, dangerous.

Duck Feet (4) 4. Brother's Keeper (12) 6. Prying Tom (11) 2. Rich Red (10) Stand-out between the top two picks.

DUCK FEET last start winner at Ascot and could come on strong to threaten, among the main chances. BROTHER'S KEEPER last start winner at Geraldton and has the speed to overcome drawing the widest barrier, among the chances. PRYING TOM has the speed to overcome a very wide draw and two from three wins have been in the dry, don't dismiss. RICH RED unwanted by the market but right up there last start at Ascot when first up and generally strong second-up, place claims.

Young Gina (15) 9. Rare Coin (1) 14. Remunerator (10) BLACKLINE first-up after 26 week spell and placed in both lead-up trials, perfectly placed. YOUNG GINA let-up and chased well to fall just short last start at Bunbury, each-way claims.

RARE COIN resumes from a 23 week spell and placed when trialling at Lark Hill, place only. The Gospel Sin (5) 5. Paris Texas (7) 4. Kimbo's Girl (8) 1. Majestic Man (1) Looks a toss up between the top two selections.

THE GOSPEL SIN a winner at first outing this prep and rates highly with Shaun Mc Gruddy aboard, marginal top pick. PARIS TEXAS back after 24 week break and placed in last trial at Lark Hill, should be thereabouts. KIMBO'S GIRL coming off a win at Bunbury when first up and should look to roll forward, in with a chance.

MAJESTIC MAN kept chasing and just missed last start at Ascot when first up, dangerous. A Good Plan (4) 2. It's Got It All (16) 16. Thunderplump (1) Solid pace expected in this one. A GOOD PLAN has had a flying start to their career and likely to race on the speed, a winning chance.

EASEWOLD first-up after 16 week break and won Belmont trial convincingly, place hope. IT'S GOT IT ALL led all the way to win at only start at Narrogin and has the speed to overcome a very wide draw, place best. Private Hero (3) 2. Red Scarlet (5) 3. Royal Atom (4) 6. Mr Scary (6) PRIVATE HERO a winner at first outing this prep and Stephanie Lacy a bonus, the testing material. RED SCARLET finished strongly to end up midfield last start at Doomben and goes up in trip, for the exotics.

ROYAL ATOM in strong form with two wins from eight attempts this campaign and returns to shorter trip, outside hope. MR SCARY has three placings from 11 runs this prep and drops in weight, for the wider exotics.

ejector marks ballistics

Wicked Express (3) 1. Ahwahneechee (4) Scratched 6. Le Drama (8) 4. Enterprise March (7) Hard to assess with minimal form to go by. WICKED EXPRESS couldn't hold on and just missed last start at Sunshine Coast, big chance.