MechaDragon
member
- Joined
- Dec 22, 2021
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- 109
Thread has devolved into nothing but trolling and childish behavior. Feel free to select another thread.
A lot of people think 300BLK is the way to go if you want to build a general-purpose SBR thats kinda good at everything and yet a master of nothing. But they are completely wrong.
The real answer: is 6.5 Grendel. And Ill explain why.
6.5 Grendel is way more versatile than 300 BLK. The one thing BLK has over Grendel is the fact that subsonic rounds are easily and readily available and its a bit more quiet. This is true, but subsonic BLK is useless at anything other than close-range defense.
Grendel outperforms BLK at ANY other scenario. This is because 6.5 Grendel is more efficient with a slightly smaller projectile and longer casing with more gun powder behind it.
As a result, Grendel has more muzzle energy from the same barrel length and the projectile is so much more aerodynamic (Higher BC) that it carries its energy much further down range as well.
Because of this, its more efficient than 300BLK with shorter barrels. While you can get 2400 FPS from a 110gr BLK, it requires a 16" barrel to do so. Meanwhile, with Grendel you get the same velocity with a 115gr projectile from a 12" barrel.
6.5 Grendel is also designed to burn pretty much all of its powder in the first 11-12" of barrel and so while not quite as fast-burning as 300BLK, you get a FAR MORE CAPABLE weapon system in a package the same size as a lot of 300BLK builds. Its not like a 12.5" rifle is large, its still VERY compact.
Grendel is so much more efficient than 300BLK that when firing 110gr of each cartridge from both calibers with 16" barrels, Grendel has DOUBLE the energy remaining at 300 yards from the shooter.
According to a ballistic chart looking into the matter - Grendel 115gr has muzzle velocity of 2,590 FPS and an energy of 1,713 ft-lbs and still has 995 ft-lbs after 300 yards with a drop of 9.8", then has 670 ft-lbs left at 500 yards with a drop of 58.1".
300BLK doesn't even come CLOSE. 110gr fired from the same barrel length has a muzzle velocity of 2,350 FPS and an energy of 1,349 ft-lbs. At 300 yards the BLK has dropped to 625 ft-lbs and has dropped by 13.8". At 500 yards the round is basically useless at 369 ft-lb remaining and having dropped a full 86.5".
So with 6.5 Grendel, you can build a backpack gun/SBR with a 10-12" barrel and its actually fully EFFECTIVE at taking medium sized game with an ethical kill out to 250 yards. 300BLK with the same barrel length has a absolute maximum humane kill range of 150 yards with the correct ammunition.
So there you have it. 300 BLK is better at suppression but there are subsonic 6.5 Grendel loads available, its just 300BLK is ever so slightly better at it. But then 300BLK gets owned at literally every other scenario.
I understand that 300BLK is popular for the suppression but you can suppress a 9mm PCC/Sub-Gun as well and have a MUCH lower chance of over-penetrarion.
So, if you really want the "One Rifle That Does it All" or gets as close as possible while also being compact - your only real choice is 6.5 Grendel. 300BLK supersonics just don't have the range when fired from a short barrel and they drop too quickly as well. Meanwhile, I bet anyone could hit steel at 500 yards with a 6.5 Grendel SBR after some practice. After all, we have already seen people reach out to 700 yards with supersonic 300BLK from a 9" barrel, theres just so much drop he was literally off the scope mil markings and had to adjust the scope turrets.
My ONLY gripe with 6.5 Grendel is the price of ammunition. You won't find even cheap stuff under 80 cents per round. Thats basically robbery considering that like 300BLK, the round was also introduced as a possible replacement for 9mm SMGs in the military as an effective CQB cartridge that still functions in the AR Platform. If the inventor of 6.5 Grendel hadn't been dumb enough to patent the design at first, the military may very well have adopted it over 300BLK considering it can also be suppressed quite well with subsonic rounds available.
A lot of people think 300BLK is the way to go if you want to build a general-purpose SBR thats kinda good at everything and yet a master of nothing. But they are completely wrong.
The real answer: is 6.5 Grendel. And Ill explain why.
6.5 Grendel is way more versatile than 300 BLK. The one thing BLK has over Grendel is the fact that subsonic rounds are easily and readily available and its a bit more quiet. This is true, but subsonic BLK is useless at anything other than close-range defense.
Grendel outperforms BLK at ANY other scenario. This is because 6.5 Grendel is more efficient with a slightly smaller projectile and longer casing with more gun powder behind it.
As a result, Grendel has more muzzle energy from the same barrel length and the projectile is so much more aerodynamic (Higher BC) that it carries its energy much further down range as well.
Because of this, its more efficient than 300BLK with shorter barrels. While you can get 2400 FPS from a 110gr BLK, it requires a 16" barrel to do so. Meanwhile, with Grendel you get the same velocity with a 115gr projectile from a 12" barrel.
6.5 Grendel is also designed to burn pretty much all of its powder in the first 11-12" of barrel and so while not quite as fast-burning as 300BLK, you get a FAR MORE CAPABLE weapon system in a package the same size as a lot of 300BLK builds. Its not like a 12.5" rifle is large, its still VERY compact.
Grendel is so much more efficient than 300BLK that when firing 110gr of each cartridge from both calibers with 16" barrels, Grendel has DOUBLE the energy remaining at 300 yards from the shooter.
According to a ballistic chart looking into the matter - Grendel 115gr has muzzle velocity of 2,590 FPS and an energy of 1,713 ft-lbs and still has 995 ft-lbs after 300 yards with a drop of 9.8", then has 670 ft-lbs left at 500 yards with a drop of 58.1".
300BLK doesn't even come CLOSE. 110gr fired from the same barrel length has a muzzle velocity of 2,350 FPS and an energy of 1,349 ft-lbs. At 300 yards the BLK has dropped to 625 ft-lbs and has dropped by 13.8". At 500 yards the round is basically useless at 369 ft-lb remaining and having dropped a full 86.5".
So with 6.5 Grendel, you can build a backpack gun/SBR with a 10-12" barrel and its actually fully EFFECTIVE at taking medium sized game with an ethical kill out to 250 yards. 300BLK with the same barrel length has a absolute maximum humane kill range of 150 yards with the correct ammunition.
So there you have it. 300 BLK is better at suppression but there are subsonic 6.5 Grendel loads available, its just 300BLK is ever so slightly better at it. But then 300BLK gets owned at literally every other scenario.
I understand that 300BLK is popular for the suppression but you can suppress a 9mm PCC/Sub-Gun as well and have a MUCH lower chance of over-penetrarion.
So, if you really want the "One Rifle That Does it All" or gets as close as possible while also being compact - your only real choice is 6.5 Grendel. 300BLK supersonics just don't have the range when fired from a short barrel and they drop too quickly as well. Meanwhile, I bet anyone could hit steel at 500 yards with a 6.5 Grendel SBR after some practice. After all, we have already seen people reach out to 700 yards with supersonic 300BLK from a 9" barrel, theres just so much drop he was literally off the scope mil markings and had to adjust the scope turrets.
My ONLY gripe with 6.5 Grendel is the price of ammunition. You won't find even cheap stuff under 80 cents per round. Thats basically robbery considering that like 300BLK, the round was also introduced as a possible replacement for 9mm SMGs in the military as an effective CQB cartridge that still functions in the AR Platform. If the inventor of 6.5 Grendel hadn't been dumb enough to patent the design at first, the military may very well have adopted it over 300BLK considering it can also be suppressed quite well with subsonic rounds available.
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