Showing posts with label CARTRIDGE. Show all posts
Showing posts with label CARTRIDGE. Show all posts

Sunday, March 18, 2012

Handgun Bullet Stopping Power: Beyond the Hyperbole of Cartridge Advocacy

Handgun Bullet Stopping Power: Beyond the Hyperbole of Cartridge Advocacy Review



For the law enforcement officer and the civilian who may be in a situation that requires the use of a handgun to stop a lethal threat action, it is important that the person differentiates between the crass, glib and self-serving advertisements of ammunition vendors and the reality of how, what and why effective stopping power occurs.

Factors to consider are the physiological response, the psychological response, the time frame parameter and bullet efficacy. Of these four factors, only bullet efficacy can be somewhat controlled by the person, this only by understanding how and to what extent the bullet contributes to the degree of stopping power obtained.

A number of concepts / formulae have been included so as to permit the reader to consider their merits and whether or not they are consistent with the reality of biology, physics and other relevant sciences.

Finally the material in this book is intended to permit those persons to instruct, teach or make decisions regarding the selection of a service handgun/cartridge combination that will help to provide the means to prevail in a lethal threat confrontation.

About the Author:
Mr. Bredsten retired from the Federal Law Enforcement Training Center/Firearms Division (FLETC/FAD). With FLETC/FAD he performed duties as a firearms instructor and he also taught ballistics to the FLETC/FAD staff and to students in the Law Enforcement Rifle Training Program and in the Precision Rifle (Sniper) and Observer Program. Subjects covered included the ballistic coefficient, barrel time, the coefficient of reduction (form), Greenhill formula (rate of rifling twist), firearm recoil, bullet time-of-flight, bullet drop, bullet midrange, wind deflection, bullet penetration potential and bullet terminal (wounding) efficacy.
Since retiring he has provided ballistics consultation service for the FLETC/FAD, the Transportation Security Agency, the Orange County (Florida) Sheriff’s Department and Exxon Mobil Corporation.
Mr. Bredsten attended and completed various classes/courses relating to firearms (e.g., H&K MP5, Steyr Aug, Uzi, Tactical Speed Shooting and advanced shotgun) and ballistics (e.g., the first and second International Wound Ballistics Conferences, a Federal Law Enforcement Ammunition and Ballistics Seminar and Oehler’s Ballistic Instrumentation). Mr. Bredsten has an AA degree from Chaffey Jr. College and a BA degree from Sacramento State College and currently resides in Georgia.


Friday, December 9, 2011

Japanese Military Cartridge Handguns 1893-1945: A Revised and Expanded Edition of Hand Cannons of Imperial Japan

Japanese Military Cartridge Handguns 1893-1945: A Revised and Expanded Edition of Hand Cannons of Imperial Japan Review



When originally published in 1981, The Hand Cannons of Imperial Japan was heralded as one of the most readable works on firearms ever produced. To arms collectors and scholars, it remains a prized source of information on Japanese handguns, their development, and their history. In this new Revised and Expanded edition, original author Harry Derby has teamed with Jim Brown to provide a thorough update reflecting twenty years of additional research. The authors have retained the format and much of the text of the original edition, focusing on military cartridge arms from the 1893-1945 period. Signal pistols, foreign-procured military handguns, ammunition, holsters, and accessories are also covered. Significant changes are included based on new findings, and a great deal of new information has been added, together with color illustrations of significant specimens. A number of newly discovered variants are identified and described, and expanded tables of reported serial numbers and production data are provided. Coverage and explanation of Japanese markings has been greatly enhanced, and a detailed study of inspection marks on the most widely known Types 14 and 94 is included. An appendix on valuation has also been added, using a relative scale that should remain relevant despite inflationary pressures. For the firearms collector, enthusiast, historian or dealer, this is the most complete and up-to-date work on Japanese military handguns ever written. Like its predecessor, it is certain to become a classic firearms reference and a benchmark for further research.


Monday, August 29, 2011

US Army, Technical Manual, TM 9-1315-249-12&P, 81MM MORTAR TRAINING DEVICE: 81MM SABOT (INERT) M1, AND 22MM SUB-CALIBER PRACTICE CARTRIDGE M744, M745, M746, AND M747, 1990

US Army, Technical Manual, TM 9-1315-249-12&P, 81MM MORTAR TRAINING DEVICE: 81MM SABOT (INERT) M1, AND 22MM SUB-CALIBER PRACTICE CARTRIDGE M744, M745, M746, AND M747, 1990 Review



US Army, Technical Manual, TM 9-1315-249-12&P, 81MM MORTAR TRAINING DEVICE: 81MM SABOT (INERT) M1, AND 22MM SUB-CALIBER PRACTICE CARTRIDGE M744, M745, M746, AND M747, 1990


Scope
This publication provides operator and unit personnel with instructions for maintenance and use of the training device for 81mm Mortars (all models); 81mm Sabot (INERT), M1; and 22mm sub-caliber practice cartridge, M744, M745, M746 and M747.


CHAPTER 1. INTRODUCTION
Section I. General
Scope
II. Description and Data
Description
Data
III. Functioning
Sabot loaded with practice round
22mm practice cartridge
CHAPTER 2. OPERATING INSTRUCTIONS
Section I. Safety Precautions
General
Safety area
Firing safety
Duds
II. Operating Procedures
Preparation for firing
Firing
During firing
Cancellation of firing
Operation under extreme weather conditions
CHAPTER 3. OPERATOR MAINTENANCE
Prior to firing
During firing
After firing
CHAPTER 4. UNIT MAINTENANCE
General
Sabot
22mm sub-caliber practice cartridge
APPENDIX A. REFERENCES
B. MAINTENANCE ALLOCATION CHART
C. BASIC ISSUE ITEMS LIST (not applicable)
D. REPAIR PARTS AND SPECIAL TOOLS LIST
E. CONSUMABLE MAINTENANCE SUPPLIES AND MATERIALS


LIST OF ILLUSTRATIONS
Figure Title Page
1-1 81mm Sabot, M1
1-2 22mm practice cartridge, M744, M745, M746, M747
1-3 81mm Sabot cross section showing 22mm cartridge in loaded position
1-4 81mm Sabot, Ml-flange nut assembly
1-5 Sabot packing box
1-6 22mm cartridge cross section
1-7 Cartridge packing box
1-8 Firing of mortar training device and cartridge
1-9 Cartridge cross section
1-10 Diagram of Sabot and 22mm cartridge, firing to impact
1-11 Optical and acoustical observation of target strikes
2-1 Recommended safety zone
2-2 Misfire removal procedure
2-3 Removal of flange nut
2-4 Insertion of cartridge
2-5 Removal of safety cap
2-6 Replacement of flange nut
2-7 Removal of fired cartridge
2-8 Firing table for 81mm Sabot, M1, using 22mm practice cartridge
3-1 Cleaning staff assembly, cleaning wick and brushes