External Ballistic tests on the using a standard 55gr bullet leaving the barrel at 3,fps reveals that the fps slows down by less than half of the velocity at a yard distance. The energy loss at this point is about pounds. The bullet also drops about 64 inches due to gravitational pull.
All this happens in. These ballistics stats mean that the is accurate and has less jump. The accuracy is enhanced by the shorter lead when the bullet moves from the case to the barrel. Although they are of the same size, the two bullets have different results when shot from a rifle.
Note that the 5. The packs more pressure and gun powder, meaning that it travels faster and is more accurate. Although the can be shot from the 5. The is also a little heavier, which means that the effect of the atmosphere on its trajectory is less than it is on the trajectory.
This means the 5. The Remington bullet is lighter and has less pressure in its chamber. Comparing the stopping power of the two bullets when fired from a 5. In simpler terms, the stopping power means that the 5. Testing results have proved that firing a bullet from a 5. This is attributable to the resulting higher jump and lead on the Some barrels can compensate for these differences while others cannot. Generally speaking, the trajectory change depends on the barrel on the rifle you will use.
The has a wide range of bullet sizes that can fit in the chamber. You need to choose what is best for you under the conditions and what you are aiming at.
For such situations, a typical grain bullet would suffice. Higher grain bullets are available with the Remington having in stock 77 grain —OTM rounds that are typically used for military marksmen.
However, some bullet weight can go up to 80 grains. The bullet drop on the 5. The start sees the bullet drop a little to about 1. The testing methodology differs, but the most accurate test has shown that the 5. Most of the 5. This design was added by the U. Military to prevent the primer from backing out when firing a fully-auto rifle in battle. As mentioned earlier, these two cartridges have similar dimensions.
The main differences are the chambering and the pressure from both of them. These two cartridges also differ in terms of pressure. The testing may differ since the. You can easily interchange the two rounds for a rifle designated for the 5. The chamber 5.
But some users claimed that firing the. However, firing a 5. Most manufacturers have labeled the rifles at the barrel, or the receivers. To be honest, the. A Remington is loaded to approximately 55, psi. The second and most important difference between the two is the fact that a 5. This allows approximately one more grain of powder to be loaded into a 5. The biggest problem with these differences is when firing a 5.
The US Army has since replaced the bismuth-tin alloy core with one of solid copper eliminating the heat issue. The United States Marine Corps purchased 1. On a media day at Aberdeen Proving Ground on May 4, , reports were given about the MA1's performance in the field since it was issued 11 months earlier.
One primary advantage given by the round is its consistent performance against soft targets. While the older M was yaw-dependant, which means its effectiveness depends on its yaw angle when it hits a target, the MA1 delivers the same effectiveness in a soft target no matter its yaw angle. The round even penetrated concrete masonry units, similar to cinder blocks, at 75 meters from an M16 and at 50 meters from an M4, which the M could not do at those ranges.
Its accuracy is maintained and sometimes increased, as it was able to shoot a 2 inch group at meters. February was the first time the MA1 was used more than the M, and approximately 30 million MA1 rounds have been fielded from June to May The shooter for the Army was Rob Harbison, a contractor supporting small caliber ammunition capability development at Fort Benning Georgia.
With an M16 loaded with MA1 ammo, Harbison fired a perfect points in the Coast Guard Trophy Match, which is 20 shots fired from the sitting position at yards, finishing 17th out of competitors. He also scored a perfect on the final string of ten shots during the Air Force Cup Trophy Match, fired at yards from the prone position, which is 10 shots in a row within the inch, point ring at yards with combat ammunition.
Harbison was happy with the performance of the EPR, with his scores showing that the Army's newest general purpose round is accurate enough to go toe-to-toe in the competition with the best ammo that can be bought or hand-loaded. Harbison even said, "I don't think I could have scored any higher if I was using match-grade competition ammunition.
Since its introduction, the MA1 has been criticized for its propellant causing increased fouling of the gun barrel. Post-combat surveys have reported no isses with the EPR in combat. A series of tests found no significant difference in fouling between the old M and the MA1. However, manufacturers have reported "severe degradation" to barrels of their rifles using the MA1 in tests. It uses a grain 5.
Two versions of the round have been procured to date. Initial production runs, designated Mark Mod 0, lacked a cannelure. Subsequent production, designated Mk Mod 1, added a cannelure to the bullet for effective crimping. Ballistics tests found that the round caused "consistent initial yaw in soft tissue" between in at ranges from 15 feet to meters. Apparently it is superior to the standard M round when fired from an M4 or M16 rifle, increasing accuracy from minute of angle to 2 minute of angle.
It evidently possesses superior stopping power, and can allow for engagements to be extended to up to meters when fired from an 18 inch barrel. It appears that this round can drastically improve the performance of any AR15 platform weapon chambered to. Superior accuracy, wounding capacity, stopping power and range power has made this the preferred round of many Special Forces operators, and highly desirable as a replacement for the older, Belgian-designed 5. In one engagement, a two-man special forces team reported 75 kills with 77 rounds.
Following early engagements in Afghanistan and Iraq, U. Working with the Naval Surface Warfare Center Crane Division , the team created performance objectives for the new ammo: increased consistency from shot to shot regardless of temperature changes, accuracy out of an M4A1 better than 2 minute of angle 2 inches at yards, 3. The first prototypes were delivered to the government in August Increased velocity and decreased muzzle flash were accomplished by the type of powder used.
The front of it is a hollow point backed up by a lead core, but the lead core only goes about halfway down the length of the bullet, while the rear half is solid brass. When the bullet hits a hard barrier, the front half of the bullet smooshes against the barrier, breaking it so the penetrating half of the bullet can go through and hit the target.
With the lead section penetrating the target and the brass section following, it was referred to as a "barrier blind" bullet. Special Forces role in counter-terror operations allow them to follow certain law enforcement guidelines, so they could use hollow point rounds without violating the Hague Convention. Officially designated the Mk Mod 0 "Cartridge, Caliber 5.
The lead portion fragments in the first few inches of soft tissue, then the solid copper rear penetrates 18 in of tissue shown though ballistic gelatin while tumbling.
Out of a 14 in barrel, the Mk has a muzzle velocity of 2, fps. In February , the U. Marine Corps adopted the Mk for use by infantry. To be fielded by an entire branch of the military, the round is classified as having an "open-tip" bullet, similar to the MLR 7.
The base of the bullet is made first, the lead core is placed on top of it, and then the jacketing is pulled up around the lead core from bottom to tip. Conventional, and cheaper, bullets are made with the method of the jacket drawn from the nose to an exposed lead base. The reverse drawn technique leaves an open tip as a byproduct of the manufacturing process, and is not specifically designed for expansion or to affect terminal ballistics. The Pentagon legally cleared the rounds for Marine use in late January.
The Marines fielded the Mk gradually and in small numbers. Initial studies showed that insurgents hit by it suffered larger exit wounds, although information was limited. Swiss Army Gw Pat 90 tracer rounds. The cartridge is also known as the Cart 5. The Swiss refer to the round as the 5. The Gw Pat 90 is optimized for use in 5.
Previous experience of a change in standard rifle had proved that changing the distance of fire for the training ranges was more expensive than the design of a new ammunition; this prompted the design of a cartridge nominally capable at meters. The cartridge was also designed to reduce pollution by controlling lead emissions. In addition, in a copper plug was added to the base of the bullet to address environmental concerns.
The bullet is a 4. The required accuracy for Gw Pat 90 ammunition out of factory test barrels is 63 mm 0. The Gw Pat 90 cartridge dimensions are in accordance with the civilian C. The Gw Pat 90 is used both in the Swiss military and in sport shooting. The very high level of individual training in the Swiss militia every single soldier bearing a weapon has to shoot for qualification once a year; see Gun politics in Switzerland and the overall use of the Gw Pat 90 by the many Swiss citizens who shoot in competitions and for amusement has resulted in significant input on its usage.
Over 1 billion cartridges have been produced as of Military Wiki Explore. Popular pages. Raaen, Jr. Project maintenance. Register Don't have an account? Edit source History Talk 0. Main article: List of 5. Archived from the original on 29 September Retrieved O'Toole Miller-Keane encyclopedia and dictionary of medicine, nursing, and allied health 6th ed. Philadelphia: Saunders. ISBN II, Ackley PO, ed. Cartridges of the World. Future Weapons.
0コメント