رأي
يعتقد أغلب الخبراء أن العيار الناري (الخرطوشة، أو الرأس المقذوف، الرصاصة) هو الجزء الرئيسي في السلاح الفردي الناري، والسلاح سواء كان المسدس، أو البندقية أو البندقية الآلية (الرشاش) ليس سوى أجزاء إضافية له
وفي الحقيقة، إن الرأس المقذوف هو الذي يحدد فاعلية أي سلاح في نهاية الأمر، إذ كلما كانت سرعة انطلاقه عالية، كان مساره أكثر استقامة في منحى تحركه، وكان أكثر دقة، وأكثر فتكا ودقة في إصابة الهدف.
An Italian company, CompBullet, has produced a radical new line of CNC-machined projectiles
with a cavity in the bullet base connected to ports (holes) placed
radially around the bullet’s circumference. Currently CompBullet offers
six bullet types: 9mm (100 gr), .40 cal (155 gr), .44 Cal (200 gr),
.45 Cal (200 gr), and .30 Caliber Rifle (125 gr).
CompBullet’s pistol projectiles have one row of radial ports, while the
longer rifle bullets have two rows, resembling the porting on a muzzle
brake
The principles on which it is based
How do the gases behave during deflagration? They push in all directions and a limited quantity passes quickly beyond the bullet, making it starting its movement. The case is still stopped, sticked to the walls of the cartridge chamber and will begin to move back with the slide, only when we don't have pressure. When the superior part of Comp Bullet will be beyond the muzzle, it will discharge, through the advanced vents, an important amount of gas, creating a muzzle brake effect perfectly symmetrical, thanks to the extremely precise vents works, done by numerical control. At the same time, according to the holes inclination kind, it can create a "rocket" effect generating the opposite of the recoil energy force. As a consequence, the effect into the hand will be less violent in order to give a greater control for faster shoot. Regarding the compensated weapons or those equipped of hybrid type holes, this system anticipates the compensation work, releasing, towards the direction of the rooms, the gas jets leaking from the superior part of the bullet, before that the following one passes through the barrel equipped with hybrid holes or compensated. It deals with a bullet which is made inside of the brake muzzle properties.
وتقدم رصاصة "كومب بوليت" بعيارات مختلفة، إلا أن جميعها مصممة على طريقة واحدة، من سبائك نحاسية مخروطية الشكل مثقوبة بثقوب، أكبرها محفور في المركز وعلى المحور الطولي للرصاصة، وبعض الثقوب "ثقوب تهوية" العرضية، التي تعبر الحفرة الطولية قطريا إلى سطحي عرض الرصاصة، وحسب مصممي هذه العيارات النارية، إن هذه الثقوب تقوم بعدة وظائف.
أولا – عندما ينفجر القادح، ويحترق البارود، يتحرك جزء من الغازات عبر الحفرة الطولية في الرصاصة، ثم تتوزع من خلال الثقوب الجانبية، منسحبة إلى الخارج، مشكلة بذلك غشاء غازيا رقيقا، يخفف الاحتكاك بين الرصاصة والجدار الداخلي للسبطانة.
وثانيا – عندما انطلاق الرصاصة من السبطانة مباشرة، تبدأ مسارها في الهواء ومع بقاء جزء من الغازات الملتهبة تتحرك في ثقوب الرصاصة بعض الوقت، وتتحول الرصاصة إلى ما يشبه الكابح الهوائي، معوضا في حركته ارتداد السلاح في يد مستخدمه، وتثبيت تحليق الرصاصة واستقرارها، لذلك وحسب، تدعى هذه العيارات النارية المثقوبة بالتعويضية "كومب بوليت".
وثالثا – توفر الغازات المنطلقة من الثقوب في الرصاصة أثناء تحليقها أثرا اندفاعيا لها، مسرعا حركتها، ويضيف مصممو هذه العيارات ميزات أخرى لاختراعهم، منها، أنها تخفف من نارية الاحتراق، وتخفت صوت الانفجار، وتبدد كثافة التيار الغازي المندفع من السلاح، وكذلك، تخفف من وزن الذخيرة المحمولة
أولا – عندما ينفجر القادح، ويحترق البارود، يتحرك جزء من الغازات عبر الحفرة الطولية في الرصاصة، ثم تتوزع من خلال الثقوب الجانبية، منسحبة إلى الخارج، مشكلة بذلك غشاء غازيا رقيقا، يخفف الاحتكاك بين الرصاصة والجدار الداخلي للسبطانة.
وثانيا – عندما انطلاق الرصاصة من السبطانة مباشرة، تبدأ مسارها في الهواء ومع بقاء جزء من الغازات الملتهبة تتحرك في ثقوب الرصاصة بعض الوقت، وتتحول الرصاصة إلى ما يشبه الكابح الهوائي، معوضا في حركته ارتداد السلاح في يد مستخدمه، وتثبيت تحليق الرصاصة واستقرارها، لذلك وحسب، تدعى هذه العيارات النارية المثقوبة بالتعويضية "كومب بوليت".
وثالثا – توفر الغازات المنطلقة من الثقوب في الرصاصة أثناء تحليقها أثرا اندفاعيا لها، مسرعا حركتها، ويضيف مصممو هذه العيارات ميزات أخرى لاختراعهم، منها، أنها تخفف من نارية الاحتراق، وتخفت صوت الانفجار، وتبدد كثافة التيار الغازي المندفع من السلاح، وكذلك، تخفف من وزن الذخيرة المحمولة
simply
Drawbacks of rifling gun barrels is that they allow a small amount of the expanding gases to exit the gun in all directions before the bullet itself does — decreasing its velocity and increasing recoil. A projectile design by Comp Bullet aims to overcome these issues with vented rounds.
According to the Italian firearms maker, these vents cause gas to discharge symmetrically behind the bullet as it leaves the muzzle. This creates a muzzle brake, which reduces recoil and a “rocket” effect that purportedly helps the round maintain velocity. The vented rounds are composed of a copper alloy and available in many sizes from 9mm up to .30 calibre.
I’m no gunsmith but it does seem odd that the simple addition of vents would have that sort of effect on a bullet’s velocity. Then again, Coors Light vented cans do seem to increase the velocity of my descent into drunkenness, so why wouldn’t vents work for the velocity of my bullets.
Italy’s CompBullet makes many claims about its new, patented ported bullets. Supposedly the ported, cavity-base bullets go faster than conventional bullets, yet generate less recoil. CompBullet also claims that its radical projectiles produce less smoke and reduced flash on exiting the muzzle. We are skeptical of many of CompBullet’s claims. We also have some concerns about bullet integrity and potential safety issues — at least when used in high-velocity applications.
Velocity
Compbullet claims that gases exiting the radial ports “lubricate” the bullet as it travels down the bore, yielding enhanced velocity. However, if any gas is actually able to exit the holes while the bullet is in the rifling (it’s not clear that in-barrel venting really occurs), then this will simply serve to REDUCE the gas pressure pushing on the base of the bullet. If anything, the bullet should go slower than a conventional projectile, not faster.
Jet Effect
CompBullet projectiles have a cylindrical cavity in the base. CompBullet claims that hot gases will shoot out the bottom of the bullet (like a rocket) and this increases velocity. But this runs contrary to the bullet-maker’s claim that the hot combustion gas moves forward and out the vents. But what, you might ask, if there are powder kernels that have migrated into the cavity and ignite inside the bullet? That might indeed cause gas to move both forward and rearward. However, the force of any rearward gas jet would be minimal compared to the main pressure flow pushing from behind, at least while the bullet is in the barrel.
Recoil Reduction
Muzzle brakes reduce felt recoil and muzzle lift, on both pistols and rifles. However, they are attached to the gun. We’re not sure how gas blowing out the sides of a bullet is going to have any effect on recoil, because that action occurs after the bullet has left the muzzle. It IS possible that some in-barrel venting from the bullet’s ports may occur (if the ports aren’t blocked by the rifling), but that, as explained above, will only serve to reduce pressure pushing on the base of the bullet and hence reduce velocity. To the extent CompBullet projectiles deliver less felt recoil (if they do), it’s probably because they have lower velocity. If CompBullet projectiles actually fly faster (than do conventional bullets), that would be easy to demonstrate with chronograph tests. However, CompBullet provides NO CHRONOGRAPH DATA on its website. Without such data, we remain unconvinced.
Safety Issues
With a CompBullet projectile, there is the potential for powder to shift from the cartridge case into the bullet’s central cavity, prior to ignition. If this occurs, and the kernels inside the bullet do not fire off prior to the bullet leaving the barrel, there is the possibility of an explosive fragmentation of the bullet once it leaves the muzzle. We don’t know if this could actually happen, but there’s a word for a small, metal container filled with gunpowder — a grenade.
Bullet Integrity
A conventional jacketed bullet can fly apart when the combination of heat, friction, and spinning force stresses the bullet’s construction. With the CompBullet projectile, you have a bullet that is heated from the inside out, with numerous weakening holes drilled in the structure.
Accuracy
We discussed the effect of radial ports on a bullet with Bryan Litz, chief Ballistician for Berger Bullets. He said: “this ported bullet design is interesting, but I can’t see how it would have any usefulness for precision shooting. If flaming gas really jets out the ports, and the outflow of every port is not perfectly uniform, then this will quickly cause a reduction of bullet stability, which won’t help accuracy at all.” Bryan also wondered if drag from the gas out-flowing from the ports might slow down bullet spin-rate. With less rpm, spin-stabilization would be reduced. “Unstable bullets are not accurate”, Bryan added.
Flash Signature
There does appear to be some evidence of a smaller smoke “cloud” on bullet exit and a reduced flash signature, if the photos on the CompBullet website can be believed. We would like to see an actual comparison between conventional ammo and CompBullet ammo, using identical powder charges. CompBullet’s photos do not provide a comparison with ammo loaded with non-ported bullets. We cannot confirm that flash is reduced unless we can see photos of both ported and non-ported bullets, shot with the same powder loads, in the same lighting conditions. See sequence below with 9x21mm pistols:
Drawbacks of rifling gun barrels is that they allow a small amount of the expanding gases to exit the gun in all directions before the bullet itself does — decreasing its velocity and increasing recoil. A projectile design by Comp Bullet aims to overcome these issues with vented rounds.
According to the Italian firearms maker, these vents cause gas to discharge symmetrically behind the bullet as it leaves the muzzle. This creates a muzzle brake, which reduces recoil and a “rocket” effect that purportedly helps the round maintain velocity. The vented rounds are composed of a copper alloy and available in many sizes from 9mm up to .30 calibre.
I’m no gunsmith but it does seem odd that the simple addition of vents would have that sort of effect on a bullet’s velocity. Then again, Coors Light vented cans do seem to increase the velocity of my descent into drunkenness, so why wouldn’t vents work for the velocity of my bullets.
Italy’s CompBullet makes many claims about its new, patented ported bullets. Supposedly the ported, cavity-base bullets go faster than conventional bullets, yet generate less recoil. CompBullet also claims that its radical projectiles produce less smoke and reduced flash on exiting the muzzle. We are skeptical of many of CompBullet’s claims. We also have some concerns about bullet integrity and potential safety issues — at least when used in high-velocity applications.
Velocity
Compbullet claims that gases exiting the radial ports “lubricate” the bullet as it travels down the bore, yielding enhanced velocity. However, if any gas is actually able to exit the holes while the bullet is in the rifling (it’s not clear that in-barrel venting really occurs), then this will simply serve to REDUCE the gas pressure pushing on the base of the bullet. If anything, the bullet should go slower than a conventional projectile, not faster.
CompBullet projectiles have a cylindrical cavity in the base. CompBullet claims that hot gases will shoot out the bottom of the bullet (like a rocket) and this increases velocity. But this runs contrary to the bullet-maker’s claim that the hot combustion gas moves forward and out the vents. But what, you might ask, if there are powder kernels that have migrated into the cavity and ignite inside the bullet? That might indeed cause gas to move both forward and rearward. However, the force of any rearward gas jet would be minimal compared to the main pressure flow pushing from behind, at least while the bullet is in the barrel.
Recoil Reduction
Muzzle brakes reduce felt recoil and muzzle lift, on both pistols and rifles. However, they are attached to the gun. We’re not sure how gas blowing out the sides of a bullet is going to have any effect on recoil, because that action occurs after the bullet has left the muzzle. It IS possible that some in-barrel venting from the bullet’s ports may occur (if the ports aren’t blocked by the rifling), but that, as explained above, will only serve to reduce pressure pushing on the base of the bullet and hence reduce velocity. To the extent CompBullet projectiles deliver less felt recoil (if they do), it’s probably because they have lower velocity. If CompBullet projectiles actually fly faster (than do conventional bullets), that would be easy to demonstrate with chronograph tests. However, CompBullet provides NO CHRONOGRAPH DATA on its website. Without such data, we remain unconvinced.
Safety Issues
With a CompBullet projectile, there is the potential for powder to shift from the cartridge case into the bullet’s central cavity, prior to ignition. If this occurs, and the kernels inside the bullet do not fire off prior to the bullet leaving the barrel, there is the possibility of an explosive fragmentation of the bullet once it leaves the muzzle. We don’t know if this could actually happen, but there’s a word for a small, metal container filled with gunpowder — a grenade.
Bullet Integrity
A conventional jacketed bullet can fly apart when the combination of heat, friction, and spinning force stresses the bullet’s construction. With the CompBullet projectile, you have a bullet that is heated from the inside out, with numerous weakening holes drilled in the structure.
Accuracy
We discussed the effect of radial ports on a bullet with Bryan Litz, chief Ballistician for Berger Bullets. He said: “this ported bullet design is interesting, but I can’t see how it would have any usefulness for precision shooting. If flaming gas really jets out the ports, and the outflow of every port is not perfectly uniform, then this will quickly cause a reduction of bullet stability, which won’t help accuracy at all.” Bryan also wondered if drag from the gas out-flowing from the ports might slow down bullet spin-rate. With less rpm, spin-stabilization would be reduced. “Unstable bullets are not accurate”, Bryan added.
Flash Signature
There does appear to be some evidence of a smaller smoke “cloud” on bullet exit and a reduced flash signature, if the photos on the CompBullet website can be believed. We would like to see an actual comparison between conventional ammo and CompBullet ammo, using identical powder charges. CompBullet’s photos do not provide a comparison with ammo loaded with non-ported bullets. We cannot confirm that flash is reduced unless we can see photos of both ported and non-ported bullets, shot with the same powder loads, in the same lighting conditions. See sequence below with 9x21mm pistols:
وتدل الأعيرة النارية الايطالية الصنع، من شركة "كومب بوليت" على أنها لا تؤمن سرعة عالية فقط، ولكن تخفف من ارتداد السلاح، الذي يسبب تبعثرا في الإصابات عند الإطلاق، والسر الرئيسي في هذه الأعيرة النارية يكمن في الثقوب الموجودة على الرأس المقذوف.
The Comp Bullet offers a series of bullets for great performances guns and as well for extreme precision shooting sport. Comp Bullet patented system allows to reduce considerably the recoil bother, especially for the guns not equipped of compensator or muzzle brake.
