Top Spanish Hunting
Well-Known Member
Due to a commercial agreement we have been testing these bullets for a year, precisely in the caliber that I mentioned in another thread, the 8.5x55 Blaser. I leave you here our opinion,
KJR are the initials of 'Kupfer-Jagd-Geschoss', which translated from German means 'copper hunting bullet'. And KJG-SR is the name of one of the best 'green' projectiles that have been designed to date. It develops very high velocities in all the cartridges in which it is manufactured and, particularly, provides excellent results in Spanish hunting. These are its characteristics. On the sax-aumunition.de page you can find the complete list of available cartridges and their characteristics and ballistic table, in addition to the characteristics of the other projectiles designed by Sax. Sax is a company specialized in lead-free ammunition, so all the ammunition it manufactures is “ecological”, most of them made of copper.
However, unlike the KJG-SR bullet, the other projectiles it has invented have been designed for more specific uses, both for hunting and shooting, which is why they are offered in a smaller variety of calibers. This is the case, among many others, of the Sax MJG-HS hunting bullet, as it is designed to shoot down small animals, and also of the KJG-BCS hunting bullet, made of solid copper, as it is offered in African calibers (.458 Win . Mag, .470 Nitro Expres, etc.), which we do not deal with. The KJG-SR is the most universal hunting projectile and the one that has made Sax most famous. It is manufactured from a special copper alloy and Tobías Büttner invested no less than 11 years in its design and another 2 more in perfecting it.
It has a plastic insert at its tip (which is red in commercial ammunition and black in reloading tips) and on its body some thin bands that reduce friction, instead of an anti-friction coating, to prevent it from “ “copper” the cannons. Furthermore, and as an additional advantage (which I have personally verified at my shooting range), the barrel, being subjected to a lower friction force, heats up (and wears out) less. Likewise, I have also noticed that the recoil is less, compared to lead ammunition, although this aspect is surely also influenced by the fact that the KJG-SR bullets are very light. But the characteristic that most differentiates it from conventional lead projectiles is that, with few exceptions (for example, the 8x68 S which is loaded with 8.2 and 9.5 gram bullets), in almost all calibers the projectile KJG-SR is offered with a single weight with which it can be used to hunt all species of large game on stalking and game on the move, with the only condition of using a caliber with adequate power. And for this reason, it is one of the most universal and easiest to use bullets because you only have to use it, in any modality, with the only weight in which the manufacturer offers it.
This universal behavior is due to the fact that its effect ballistics have been calculated so that it does not kill by releasing energy due to deformation, as happens with conventional bullets, which requires the use of projectiles of different weights for the same caliber to ensure that they deform correctly. on impact (lighter in lighter weight pieces or when used at long distance; conversely, heavier bullets at close range, etc.).
The KJG-SR kills by partial fragmentation in the following way: at one point on the body they have a rupture zone so that, after penetrating about 2.5 cm. inside the animal, loses its tip and it also fragments (in reaction to the action of the plastic insertion), so it is suddenly stopped and releases a large amount of energy, while the rest of the body continues to penetrate and cross the piece so that it bleeds profusely and, if it is injured, it can be easily stepped on. As a ballistic benefit, once the shot is placed fairly well, the pieces are not injured because the fragments of the tip, which in close shots can also pass through the animal, cause additional wounds that can minimize the effects of a poorly placed shot.
According to the manufacturer, between 20-25 percent of the mass of the projectile is converted into a few (5-6) fragments so, depending on the caliber, these can be of a very considerable size when it comes to producing “extra” wounds. ”.
If a caliber of adequate power is used (logically we are not going to achieve good results using a .222 to hunt a wild boar), the second condition for the lethal fragmentation effect of the KJG-SR projectile to occur is that it hits with a speed equal to or greater than 600 meters per second.
However, this is not a problem because Sax cartridges loaded with this bullet are faster at 300 meters. Even the most “modest” standard calibers (for example, the 8.2 gram bullet of the 8x57 JS, etc.) reach 300 meters with a velocity of 636 m/s, not to mention the most powerful standard cartridges or the magnums that They normally reach 300 meters with a remaining speed close to or greater than 700 m/s: 681 m/s for the 6.5x55; 737 m/s the .270 Win; 757 m/s the 7 mm. Rem. Mag.; 765 m/s the .300 Win. Mag, etc. These high velocities are due to the fact that, being made of copper, the KJG-SR bullets weigh much less than conventional ones with a lead core, so, using suitable good quality powder and Sax uses it, they can be fired at very high velocities. . Unthinkable for lead ammunition of the same calibers: thus, for example, the Sax .30-06 cartridge, which is offered with an 8.0 gram (123 grain) bullet, has an initial velocity of 1,000 meters per second; the 7mm Rem. Mag loaded with a 6.7 gram (103.4 grain) bullet throws 1,076 m/s and 1,115 m/s! that of the .270 WSM with a 6.2 gram (95.7 grain) projectile.
Well, after talking about all the theory on paper, we will tell you our experience in practice with the 8.5x55 Blaser. We have shot down approximately 30 animals with these bullets, from roe deer to 250kg mountain deer. With very close shots up to 415 meters. Our opinion is that they are very versatile bullets but where they truly stand out is in small/medium sized animals (up to 90kg). Because? In the end they are manufactured in very few grains and although they have a part of the projectile that guarantees penetration, it barely expands, causing hardly any damage and creating a bit of a needle effect. The part that really causes damage in very large animals and at these speeds fragments too quickly and is not usually in the vital parts that are deeper inside the animal. Having said this, we have found all the animals shot, but it is true that when shooting an 8.5 caliber, some with the shot placement they were carrying must have fallen on the spot or died almost instantly, something they have not done with these bullets.
KJR are the initials of 'Kupfer-Jagd-Geschoss', which translated from German means 'copper hunting bullet'. And KJG-SR is the name of one of the best 'green' projectiles that have been designed to date. It develops very high velocities in all the cartridges in which it is manufactured and, particularly, provides excellent results in Spanish hunting. These are its characteristics. On the sax-aumunition.de page you can find the complete list of available cartridges and their characteristics and ballistic table, in addition to the characteristics of the other projectiles designed by Sax. Sax is a company specialized in lead-free ammunition, so all the ammunition it manufactures is “ecological”, most of them made of copper.
However, unlike the KJG-SR bullet, the other projectiles it has invented have been designed for more specific uses, both for hunting and shooting, which is why they are offered in a smaller variety of calibers. This is the case, among many others, of the Sax MJG-HS hunting bullet, as it is designed to shoot down small animals, and also of the KJG-BCS hunting bullet, made of solid copper, as it is offered in African calibers (.458 Win . Mag, .470 Nitro Expres, etc.), which we do not deal with. The KJG-SR is the most universal hunting projectile and the one that has made Sax most famous. It is manufactured from a special copper alloy and Tobías Büttner invested no less than 11 years in its design and another 2 more in perfecting it.
It has a plastic insert at its tip (which is red in commercial ammunition and black in reloading tips) and on its body some thin bands that reduce friction, instead of an anti-friction coating, to prevent it from “ “copper” the cannons. Furthermore, and as an additional advantage (which I have personally verified at my shooting range), the barrel, being subjected to a lower friction force, heats up (and wears out) less. Likewise, I have also noticed that the recoil is less, compared to lead ammunition, although this aspect is surely also influenced by the fact that the KJG-SR bullets are very light. But the characteristic that most differentiates it from conventional lead projectiles is that, with few exceptions (for example, the 8x68 S which is loaded with 8.2 and 9.5 gram bullets), in almost all calibers the projectile KJG-SR is offered with a single weight with which it can be used to hunt all species of large game on stalking and game on the move, with the only condition of using a caliber with adequate power. And for this reason, it is one of the most universal and easiest to use bullets because you only have to use it, in any modality, with the only weight in which the manufacturer offers it.
This universal behavior is due to the fact that its effect ballistics have been calculated so that it does not kill by releasing energy due to deformation, as happens with conventional bullets, which requires the use of projectiles of different weights for the same caliber to ensure that they deform correctly. on impact (lighter in lighter weight pieces or when used at long distance; conversely, heavier bullets at close range, etc.).
The KJG-SR kills by partial fragmentation in the following way: at one point on the body they have a rupture zone so that, after penetrating about 2.5 cm. inside the animal, loses its tip and it also fragments (in reaction to the action of the plastic insertion), so it is suddenly stopped and releases a large amount of energy, while the rest of the body continues to penetrate and cross the piece so that it bleeds profusely and, if it is injured, it can be easily stepped on. As a ballistic benefit, once the shot is placed fairly well, the pieces are not injured because the fragments of the tip, which in close shots can also pass through the animal, cause additional wounds that can minimize the effects of a poorly placed shot.
According to the manufacturer, between 20-25 percent of the mass of the projectile is converted into a few (5-6) fragments so, depending on the caliber, these can be of a very considerable size when it comes to producing “extra” wounds. ”.
If a caliber of adequate power is used (logically we are not going to achieve good results using a .222 to hunt a wild boar), the second condition for the lethal fragmentation effect of the KJG-SR projectile to occur is that it hits with a speed equal to or greater than 600 meters per second.
However, this is not a problem because Sax cartridges loaded with this bullet are faster at 300 meters. Even the most “modest” standard calibers (for example, the 8.2 gram bullet of the 8x57 JS, etc.) reach 300 meters with a velocity of 636 m/s, not to mention the most powerful standard cartridges or the magnums that They normally reach 300 meters with a remaining speed close to or greater than 700 m/s: 681 m/s for the 6.5x55; 737 m/s the .270 Win; 757 m/s the 7 mm. Rem. Mag.; 765 m/s the .300 Win. Mag, etc. These high velocities are due to the fact that, being made of copper, the KJG-SR bullets weigh much less than conventional ones with a lead core, so, using suitable good quality powder and Sax uses it, they can be fired at very high velocities. . Unthinkable for lead ammunition of the same calibers: thus, for example, the Sax .30-06 cartridge, which is offered with an 8.0 gram (123 grain) bullet, has an initial velocity of 1,000 meters per second; the 7mm Rem. Mag loaded with a 6.7 gram (103.4 grain) bullet throws 1,076 m/s and 1,115 m/s! that of the .270 WSM with a 6.2 gram (95.7 grain) projectile.
Well, after talking about all the theory on paper, we will tell you our experience in practice with the 8.5x55 Blaser. We have shot down approximately 30 animals with these bullets, from roe deer to 250kg mountain deer. With very close shots up to 415 meters. Our opinion is that they are very versatile bullets but where they truly stand out is in small/medium sized animals (up to 90kg). Because? In the end they are manufactured in very few grains and although they have a part of the projectile that guarantees penetration, it barely expands, causing hardly any damage and creating a bit of a needle effect. The part that really causes damage in very large animals and at these speeds fragments too quickly and is not usually in the vital parts that are deeper inside the animal. Having said this, we have found all the animals shot, but it is true that when shooting an 8.5 caliber, some with the shot placement they were carrying must have fallen on the spot or died almost instantly, something they have not done with these bullets.
