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Optimization of Production Process of Frangible Bullets Based on Bismuth Powder
Advances in Military Technology Vol. 14, No. 2 (2019), pp. 189-196 AiMT ISSN 1802-2308, eISSN 2533-4123 DOI 10.3849/aimt.01224 Optimization of Production Process of Frangible Bullets Based on Bismuth Powder V. Minh Do 1, X. Son Bui 1*, J. Komenda 2, R. Vítek 2 and P. Skalický2 1 Faculty of Weapons, Le Quy Don Technical University, Hanoi, Vietnam 2 Faculty of Military Technology, University of Defence in Brno, Czech Republic The manuscript was received on 29 November 2017 and was accepted after revision for publication on 20 June 2019. Abstract: The article deals with the pressing process of the samples from bismuth powder, which were used in place of the bullet in order to optimize the frangible bullets manufacturing process. Cylindrical samples with a diameter of 9 mm were compacted by cold pressing in a cylindrical rigid die without sintering. Various pressing conditions (the changing of pressing force, pressing velocity and dwell time) were applied for compacting the sam- ples. After compaction, the axial strength of the samples was tested to determine the optimal manufacturing process of the frangible bullet based on the bismuth powders. Keywords: bismuth, frangible bullet, green strength, green density, powder metallurgy, pressing force, pressing velocity 1. Introduction Powder metallurgy technology is also used in manufacturing the ammunition for fire- arms. In the commercial frangible cartridges, the frangible bullets are made of various kinds of metal powder, e.g. Cu, Fe, W, etc., where Cu is the most widespread. These metals are less ecologically harmful than lead. However, iron and copper easily cor- rode in water-rich tissues, whereas copper is toxic at high concentration in the body. -
The Texas Star
The Texas Star Newsletter for the Texican Rangers A Publication of the Texican Rangers An Authentic Cowboy Action Shooting Club That Treasures & Respects the Cowboy Tradition SASS Affiliated PO Box 782261 June 2018 San Antonio, TX 78278-2261 Officers Hello Texican Rangers President A.D. Texaz 210-862-7464 [email protected] Vice President Great NEWS! The Texican Rangers Col. Callan were awarded a SASS Wooly award at the 325-446-7632 opening ceremonies at The End of Trails [email protected] Championship this week. I will have more information at the July shoot on this Secretary prestigious honor. Tombstone Mary The other bit of news is that the board 210-262-7464 put in for and was awarded the 2019 SASS [email protected] Texas State Championship. Just like the last 2 years it will be in conjunction with Treasurer the 2019 Comancheria Days the second General Burleson weekend in April. 210-912-7908 I am looking forward to the Wild [email protected] Bunch Match on the 30th. The stages are interesting. Remember, there will be an Range Master opportunity to shoot Cowboy also. So, there is room for everyone! Colorado Horseshoe Our target stands have been fixed and 719-231-6109 returned, so we will be using them on [email protected] stages one to five for the July match. Look forward to seeing everyone in Communications soon. Dutch Van Horn A.D. Texaz 210-823-6058 [email protected] The Day John Westly Hardin Met Wild Bill Hickok By Dutch Van Horn/Regulator 51153 John Wesley Hardin, one of the deadliest men in the history of the Old West. -
Handguns of the Massachusetts Arms Company
Handguns of the Massachusetts Arms Co. by L. W. Jones The subject of this paper, the Massachusetts Arms Com- )any, has been partially covered in many sources, but iever has it been completely covered. Since it is a quite :omplicated subject I, too, shall not attempt to cover the ubject completely, but to limit myself to the percussion evolvers produced by this company. This is fitting, as the nanufacture of percussion revolvers was the reason the :ompany was formed and they were the main product of he company for the first ten years of its life. The Massachusetts Arms Company was formed late in .849 and incorporated on March 5th, 1850, but the story of ts percussion revolvers starts much earlier. On April 29th, 1837, Daniel Leavitt, of Cabotsville, Mas- ,achusetts, received patent #I82 for a revolver which :laimed "the giving of the chambered or forward end of he cylinder a convex form, by which the ignition of the manufactured by Edwin Wesson. Correspondence ;barge in a chamber contiguous to that which is being between Leavitt, Wesson, and the Ordnance Department 'ired is prevented." Very few of these revolvers were continued through the end of the year, but no government nade by Leavitt. The poor success of a Leavitt carbine in a orders were forthcoming. rial at West Point in 1837 probably led to the lack of Shortly after Stevens and Miller joined Edwin Wesson, levelopment of the system. a patent on the new revolving system, employing bevel The story now moves to 1847: in 1836 Samuel Colt pat- gears to revolve the cylinder, was applied for. -
University of Huddersfield Repository
University of Huddersfield Repository Wood, Christopher Were the developments in 19th century small arms due to new concepts by the inventors and innovators in the fields, or were they in fact existing concepts made possible by the advances of the industrial revolution? Original Citation Wood, Christopher (2013) Were the developments in 19th century small arms due to new concepts by the inventors and innovators in the fields, or were they in fact existing concepts made possible by the advances of the industrial revolution? Masters thesis, University of Huddersfield. This version is available at http://eprints.hud.ac.uk/id/eprint/19501/ The University Repository is a digital collection of the research output of the University, available on Open Access. Copyright and Moral Rights for the items on this site are retained by the individual author and/or other copyright owners. Users may access full items free of charge; copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational or not-for-profit purposes without prior permission or charge, provided: • The authors, title and full bibliographic details is credited in any copy; • A hyperlink and/or URL is included for the original metadata page; and • The content is not changed in any way. For more information, including our policy and submission procedure, please contact the Repository Team at: [email protected]. http://eprints.hud.ac.uk/ Were the developments in 19th century small -
A Short History of Firearms
Foundation for European Societies of Arms Collectors A short history of firearms Prepared for FESAC by: , ing. Jaś van Driel FARE consultants P.O. box 22276 3003 DG Rotterdam the Netherlands [email protected] Firearms, a short history The weapon might well be man’s earliest invention. Prehistoric man picked up a stick and lashed out at something or someone. This happened long before man learned to harness fire or invented the wheel. The invention of the weapon was to have a profound impact on the development of man. It provided the third and fourth necessities of life, after air and water: food and protection. It gave prehistoric man the possibility to hunt animals that were too big to catch by hand and provided protection from predators, especially the greatest threat of all: his fellow man. The strong man did not sit idly while intelligent man used the weapon he invented to match his brute force and soon came up with a weapon of his own, thus forcing intelligent man to come up with something better. The arms race had started. This race has defined the history of mankind. To deny the role that weapons in general and firearms in particular have played in deciding the course of history is like denying history itself. The early years During the Stone Age axes, knives and spears appeared and around 6000 BC the bow made its debut. This was the first weapon, after the throwing spear, that could be used at some distance from the intended target, though possibly slings also were used to hurl stones. -
Federal Ammunition for Civil War Breechloading Carbines and Rifles
Federal Ammunition for Civil War Breechloading Carbines and Rifles Dean S. Thomas According to the "Statement of ordnance and ordnance stores purchased by the Ordnance Department from January 1, 1861, to June 30, 1866," the United States Army procured more than 427,000 assorted breechloading carbines and rifles during this period.' Additional quantities were purchased from the manufacturers by various Northern states, volunteer regiments, and individual soldiers. In all, more than twenty different brands found their way onto regimental ordnance returns, and each, with rare exception, required their own peculiar form of ammunition. Captain James G. Benton of the Ordnance Department described these weapons in his book, Ordnance and Gunney: The term "breech-loading" applies to those arms in which the charge is inserted into the bore through an opening in the pered by gas leakage at the breech joint-or lack of obtura- breech; and, as far as loading is concerned, the ramrod is tion. This fault was mechanically inherent in many early dispensed with. breechloaders, but was not successfully overcome until there The interior of the barrel of a breech-loading arm is were advances in cartridge-making technology. Although the divided into two distinct parts, viz., the bore proper, or space Hall breechloading flintlock rifle was adopted by the United through which the projectile moves under the influence of the States in 1819 (and a carbine in the 1830s), they did not have powder; and the chamber in which the charge is deposited. the merits of later weapons with metallic cartridge cases. The diameter of the chamber is usually made a little larger, and Most of the early advances in breechloading ammuni- that of the bore a little smaller, than that of the projectile; this tion were made in France. -
Zhristian Sharps Was Born in Washington, New Jersey
Zhristian Sharps Was Born in Washington, New Jersey. ~yFrank M. Sellers Christian Sharps was born in Washington, New Jersey n 1811. Nobody seems to know much about Sharps' early ~fe. In that day and age, the way a man learned a trade was D apprentice himself to a master in whatever trade he vanted to learn. Sharps was apprenticed to a gunsmith in Yashington, whose name was Speigle. But Sharps did ?arn his trade and in 1830 he went to work at the arsenal t Harpers Ferry. There he came into contact with the first ~reechloaderused by the U.S. Government in any quan- ity, the Hall rifle. These were made under the supervision f the inventor, John Hall. Sharps only lasted at Harpers iar with, if not in the original guns, in their more popular 'erry about seven years and then moved to Cincinnati. As form, the boy's cap gun. Combining the Maynard primer .ear as we can tell, he didn't do any gun work at all in Cin- with the original Sharps actions gives us the Model 1850.:$ innati. He worked for his brother on the repair of steam This again was made by Albert Nippes in Philadelphia ngines for boats and factories. As I say, we don't have (actually in Mill Creek, if you are familiar with the area) ny information on what he was doing as far as guns are until late 1850, at which time Sharps decided that Nippes oncerned in Cincinnati, but in 1848, he applied for a pat- wasn't doing a good job and sold his patent to a man in nt on a breechloading gun, which was considerably dif- Hartford. -
Deadlands Armory—Revolvers.”
Rifles Part III. Magazines In Motion: Revolvers, Turrets, & Harmonicas Revolving Magazines The nineteenth century was a time of great mechanical innovation, marked by thousands of inventive creators seeking patents for all manner of curiously-engineered devices. Firearms were no exception, and a glance at any “weird weapons” collection reveals dozens of oddities, often stamped between 1820–1860. Many of these utilized some form of revolving magazine, whether a cylinder, a cluster of barrels, a turret, or some form of rotary chain. This introduction offers a short history of the revolver, followed by profiles for the more unique, popular, or interesting repeaters that use some form of moving magazine. A more detailed history of revolvers and the Colt patent is found in “Deadlands Armory—Revolvers.” Pepperbox Guns The general mechanism of a revolving magazine evolved from the “pepperbox” gun of the early nineteenth century. A pepperbox gun features a cluster of smooth-bore barrels which are rotated into position and fired individually. Predating the advent of the cartridge, pepperbox guns are muzzle-loaded, and require a separate primer charge for each barrel. Pepperbox guns began fading in popularity before the Civil War, replaced by the more efficient percussion revolver. The Percussion Revolver One of the most significant innovations in firearm design, a revolver features a cylindrical magazine that holds each round in an individual chamber. The first modern revolver was designed by Elisha Haydon Collier in 1814, and was a self-priming flintlock with a manually- rotated cylindrical magazine. Having been exposed to the Collier revolver during a voyage abroad, Samuel Colt made the critical innovation that earned him one of the century’s most famous patents—a revolving cylinder that was mechanically rotated. -
John Dahlgren the Plymouth Rifle
JOHN DAHLGREN And THE PLYMOUTH RIFLE Marc Gorelick, VGCA The author thanks Tim Prince of College Hill Arsenal (www.collegehillarsenal.com) and Cliff Sophia of CS Arms (www.csarms.com) for the use of their photographs. Few Americans today know who John Dahlgren was, or the role he played in the Civil War. Most Civil War and navy history buffs who recognize his name identify him as a Union Admiral and ordnance expert who developed a number of naval cannon. Indeed, for his achievements in developing naval cannon he became known as the “father of American naval ordnance.” But to the gun collecting community Dahlgren was also a small arms expert and the inventor of the unique Plymouth Rifle. Photo courtesy Tim Prince, College Hill Arsenal, www.collegehillarsenal.com DAHLGREN’S NAVY CAREER John Adolphus Bernard Dahlgren was born on November 13, 1809 in Philadelphia, the son of Bernhard Ulrik Dahlgren, the Swedish Consul in Philadelphia. Like another Swedish-American, John Ericsson, the inventor of the screw propeller, turret and ironclad monitor, Dahlgren was to have a profound effect on the U.S. Navy. Dahlgren joined the United States Navy in 1826 as a midshipman. He served in the U.S. Coastal Survey from 1834 to 1837 where he developed his talents for mathematics and scientific theory. He was promoted to lieutenant, and after a number of cruises was assigned as an ordnance officer at the Washington Navy Yard in 1847. Dahlgren was in his element as an ordnance officer. He excelled as a brilliant engineer and was soon given more and more responsibility. -
WHITE ET AL. V. ALLEN. [2 Fish
YesWeScan: The FEDERAL CASES 29FED.CAS.—62 Case No. 17,535. WHITE ET AL. V. ALLEN. [2 Fish. Pat. Cas. 440; 2 Cliff. 224; Merw. Pat. Inv. 705.]1 Circuit Court, D. Massachusetts. Nov., 1863. PATENTS—PRESUMPTION OF ORIGINALITY—FOREIGN PATENTS—PRIORITY OF INVENTION—REDUCTION TO PRACTICE—ABANDONMENT—TRANSLATING FOREIGN PATENT—FIRE ARMS. 1. The presumption of originality arising from the grant of a patent only extends hack to the time when the application was filed in the patent office. [Cited in Seymour v. Osborne, 11 Wall. (78 U. S.) 538.] 2. Where a foreign patent, granted before the application of the American patentee, is relied upon to destroy the novelty of the American patent, the patentee may prove that his invention was made prior to the granting of the foreign patent. 3. While the suggested improvement rests merely in the mind of the originator of the idea, the invention is not completed within the meaning of the patent law, nor are crude and imperfect experiments sufficient to confer a right to a patent. [Cited in La Baw v. Hawkins, Case No. 7,960; Reeves v. Keystone Bridge Co., Id. 11,660; Gottfried v. Philip Best Brewing Co., Id. 5,633.] 4. Mere discovery of an improvement does not constitute it the subject-matter of a patent, although the ideas which it involves may he new, but the new set of ideas, in order to become patentable, must be embodied into working machinery and adapted to practical use. 5. While he is the first inventor who has first perfected and adapted the invention to use, yet this general rule is subject to the qualification that he who invents first shall have the prior right, if, as is prescribed in section 15 of the act of 1836, he is using reasonable diligence in adapting and perfecting the same within the meaning of that provision. -
Edwin Budding and His Pepperbox: a 21St Century Update
ASAC_Vol104_00-Schneiderman_110017.qxd 1/28/12 8:00 PM Page 55 Edwin Budding and His Pepperbox: A 21st Century Update By Matthew Schneiderman There have been multishot firearms for centuries, but before the 19th century they were expensive to make and dif- ficult to use. In 1807, Alexander Forsyth patented the use of fulminates for firearm ignition1 and ushered in the percus- sion era.2 Copper cap ignition was well established by 18203, which finally made reliable, affordable multishot firearms feasible. Appearing in England about 1825, the Budding pep- perbox was the first step along this path. Historically, it’s an important weapon: 1. the world’s earliest percussion pepperbox;4 2. the world’s earliest percussion revolver;5 3. the earliest percussion pistol with in-line (horizon- tal) nipples, long before Colt (makers of the period called this Central Fire);6 4. the earliest copper cap pistol with an enclosed action;7,8 5. and one of world’s earliest percussion underham- mer (understriker) firearms. grips.14 The barrel group must be removed for capping.15 There is no surviving information on Budding’s gunmak- The barrels, frame, and grip retaining screws are brass.16 ing business; this is a firearm without a historical record. A small, steel, spring-controlled catch at the top edge of the Those of you who collect and research in similar circum- frame indexes the barrels (Figure 2). All are Birmingham stances will probably recognize and enjoy some of the issues proofed; on some, the barrels are numbered. As with other debated in Budding Studies. -
SBN 144258 Sean A. Brady – SBN 262007 2 Anna M
Case 3:17-cv-01017-BEN-JLB Document 50-12 Filed 03/05/18 PageID.5013 Page 1 of 67 1 C.D. Michel – SBN 144258 Sean A. Brady – SBN 262007 2 Anna M. Barvir – SBN 268728 Matthew D. Cubeiro – SBN 291519 3 MICHEL & ASSOCIATES, P.C. 180 E. Ocean Boulevard, Suite 200 4 Long Beach, CA 90802 Telephone: (562) 216-4444 5 Facsimile: (562) 216-4445 Email: [email protected] 6 Attorneys for Plaintiffs 7 8 IN THE UNITED STATES DISTRICT COURT 9 FOR THE SOUTHERN DISTRICT OF CALIFORNIA 10 VIRGINIA DUNCAN, et al., Case No: 17-cv-1017-BEN-JLB 11 Plaintiffs, EXHIBITS 27-30 TO THE DECLARATION OF ANNA M. 12 v. BARVIR IN SUPPORT OF PLAINTIFFS’ MOTION FOR 13 XAVIER BECERRA, in his official SUMMARY JUDGMENT OR, capacity as Attorney General of the State ALTERNATIVELY, PARTIAL 14 of California, SUMMARY JUDGMENT 15 Defendant. Hearing Date: April 30, 2018 Hearing Time: 10:30 a.m. 16 Judge: Hon. Roger T. Benitez Courtroom: 5A 17 18 19 20 21 22 23 24 25 26 27 28 435 EXHIBITS 27-30 TO THE DECLARATION OF ANNA M. BARVIR 17cv1017 Case 3:17-cv-01017-BEN-JLB Document 50-12 Filed 03/05/18 PageID.5014 Page 2 of 67 1 EXHIBITS TABLE OF CONTENTS 2 3 Exhibit Description Page(s) 4 1 Expert Report of James Curcuruto 00019-26 5 2 Expert Report of Stephen Helsley 00027-38 6 3 Expert Rebuttal Report of Professor Gary Kleck 00039-102 7 8 4 Expert Rebuttal Report of Professor Carlisle Moody 00103-167 9 5 Expert Report of Dr.