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6.5 VS 6.8
- Thread starter GM2
- Start date
Re: 6.5 VS 6.8
Only difference is that you have a better selection of bullets on the 6.5. I do like the 6.8/.277 a little more though. Just my 2 cents.
Only difference is that you have a better selection of bullets on the 6.5. I do like the 6.8/.277 a little more though. Just my 2 cents.
Re: 6.5 VS 6.8
6.5=long range...6.8=medium range with the nod on reliability going to the 6.8.
Steve
6.5=long range...6.8=medium range with the nod on reliability going to the 6.8.
Steve
Re: 6.5 VS 6.8
For me it's 6.5 all the way. The selection of high BC 6.5mm bullets simply blows the 6.8 out of the water IMHO.
For me it's 6.5 all the way. The selection of high BC 6.5mm bullets simply blows the 6.8 out of the water IMHO.
Re: 6.5 VS 6.8
Depends on what you are going to do with it. For long range work, the 6.5mm bullets has more choices.
Depends on what you are going to do with it. For long range work, the 6.5mm bullets has more choices.
Re: 6.5 VS 6.8
To me, the 6.8 is too overrated...its main drawback is the case is too long to seat heavier (read, higher BC) bullets. That and the 6.5 has more energy all accross the board, and .264" to .277" gap isn't big enough that i would go with the bigger bullet.
the main reason the 6.8 is so popular, well, there are 2, remington was behind the 6.8, and AA is keeping the rights to the 6.5 well restricted, and no one wants to pay the royalties to make it.
To me, the 6.8 is too overrated...its main drawback is the case is too long to seat heavier (read, higher BC) bullets. That and the 6.5 has more energy all accross the board, and .264" to .277" gap isn't big enough that i would go with the bigger bullet.
the main reason the 6.8 is so popular, well, there are 2, remington was behind the 6.8, and AA is keeping the rights to the 6.5 well restricted, and no one wants to pay the royalties to make it.
Re: 6.5 VS 6.8
Have seen several graphs about ballistics between 5,56-6,5-6,8 and the 7,62. The 6,5 is really the the better round for the ar15 platform especially for the long range work.
Only try to think where they were designed for. 6,8 was developed to give more punch (while maintaining the ar15 benefits of round capacity and so one, same for the 6,5) then a 5,56 and the 6,5 to give a more accurate and powerful round.
The only reason I can think of to go for 6,8 instead of the 6,5 would be end-ballistics if that would be a concern. Didn't see a good comparison between the rounds on those grounds.
Also 6,8 is not a good performer on the longer ranges.
GM2 if you want the rifle for range shooting I would go for the 6,5 I think this round has a lot of potential!
This is just my two cents
Have seen several graphs about ballistics between 5,56-6,5-6,8 and the 7,62. The 6,5 is really the the better round for the ar15 platform especially for the long range work.
Only try to think where they were designed for. 6,8 was developed to give more punch (while maintaining the ar15 benefits of round capacity and so one, same for the 6,5) then a 5,56 and the 6,5 to give a more accurate and powerful round.
The only reason I can think of to go for 6,8 instead of the 6,5 would be end-ballistics if that would be a concern. Didn't see a good comparison between the rounds on those grounds.
Also 6,8 is not a good performer on the longer ranges.
GM2 if you want the rifle for range shooting I would go for the 6,5 I think this round has a lot of potential!
This is just my two cents
Re: 6.5 VS 6.8
I plan on testing my 6.5 grendel this weekend. I sure hope it does what I hear many folks bragging on. I am looking for a long range priare dog gun
I plan on testing my 6.5 grendel this weekend. I sure hope it does what I hear many folks bragging on. I am looking for a long range priare dog gun
Re: 6.5 VS 6.8
thanks for the feedback. So is the general idea that the 6.5 is better for long range and the 6.8 better for close?
The 6.5 I shot was at steel plates at 125 yards. Not exactly a hard or long shot by any means, but i was impressed with the "feel" of it.
thanks for the feedback. So is the general idea that the 6.5 is better for long range and the 6.8 better for close?
The 6.5 I shot was at steel plates at 125 yards. Not exactly a hard or long shot by any means, but i was impressed with the "feel" of it.
Re: 6.5 VS 6.8
Thats pretty much it. I am shooting a 270WSM with a 150 grain VLD with at BC or .531. The good bullets in the 6.5's will have BC's of about 550 to 600. Not much of a difference IMO. I do think the .277 bullets selection will get larger to offer better long range bullets but that will take a while.
Thats pretty much it. I am shooting a 270WSM with a 150 grain VLD with at BC or .531. The good bullets in the 6.5's will have BC's of about 550 to 600. Not much of a difference IMO. I do think the .277 bullets selection will get larger to offer better long range bullets but that will take a while.
Re: 6.5 VS 6.8
They are both excellent rounds. Out to 600 yards, they are even. The Grendel takes over after that with the BC.
I just went to J.Boyette's Marksmanship class which was 0-500 yards with 6.8SPC Rifles only and we were hitting 500 yard metal targets with the SSA Speer 90 Gr. TNT ammo, which was underpowered.
If you want more info, go to their websites:
www.65grendel.com
www.68forums.com
They are both excellent rounds. Out to 600 yards, they are even. The Grendel takes over after that with the BC.
I just went to J.Boyette's Marksmanship class which was 0-500 yards with 6.8SPC Rifles only and we were hitting 500 yard metal targets with the SSA Speer 90 Gr. TNT ammo, which was underpowered.
If you want more info, go to their websites:
www.65grendel.com
www.68forums.com
Re: 6.5 VS 6.8
6.5 over 6.8...6.8 cannot keep up. A straight 6mm is better as well. I despise 270 calibers because their bullets suck compared to most other caliber.
The 'experts' should have made the 6.8SPC either 6.5 or 6 and they would have had a winner, but they failed...IMO.
6.5 over 6.8...6.8 cannot keep up. A straight 6mm is better as well. I despise 270 calibers because their bullets suck compared to most other caliber.
The 'experts' should have made the 6.8SPC either 6.5 or 6 and they would have had a winner, but they failed...IMO.
Re: 6.5 VS 6.8
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BALLISTIC</div><div class="ubbcode-body">6.5 over 6.8...6.8 cannot keep up. A straight 6mm is better as well. I despise 270 calibers because their bullets suck compared to most other caliber.
The 'experts' should have made the 6.8SPC either 6.5 or 6 and they would have had a winner, but they failed...IMO. </div></div>
Out to 600 yards, the SPC can definitely keep up and with the new bullets that are out, it can more than keep up. I can easily get 2900 FPS with the Speer 90 Gr. TNT with 29.1 Gr. of H4198 out of my 14" upper.
If you like the 6mm bullets, there are two 6.8SPC necked down to 6mm (6mmWOA and 6mmHagar).
By the way, those outdated charts you see going around compare the best Grendel load out of a 24" barrel to one of the worst SPC load out of a 16" barrel. Fair comparison.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BALLISTIC</div><div class="ubbcode-body">6.5 over 6.8...6.8 cannot keep up. A straight 6mm is better as well. I despise 270 calibers because their bullets suck compared to most other caliber.
The 'experts' should have made the 6.8SPC either 6.5 or 6 and they would have had a winner, but they failed...IMO. </div></div>
Out to 600 yards, the SPC can definitely keep up and with the new bullets that are out, it can more than keep up. I can easily get 2900 FPS with the Speer 90 Gr. TNT with 29.1 Gr. of H4198 out of my 14" upper.
If you like the 6mm bullets, there are two 6.8SPC necked down to 6mm (6mmWOA and 6mmHagar).
By the way, those outdated charts you see going around compare the best Grendel load out of a 24" barrel to one of the worst SPC load out of a 16" barrel. Fair comparison.
Re: 6.5 VS 6.8
Keep in mind what they were designed for. The 6.8 is going to replace the 5.56 for military use EVENTUALLY. Bill Alexander designed the grendel for long range accuracy out or an AR. They both excel at what their intended purpose was. But this comparison thing is going through the roof with these new cartridges. Kind of like I get flack all the time from the .338 wm shooters about my .325 wsm. I like it. It was my choice simply because it was my choice. You can't compare a sprinter to a long distance runner. And that's "the rest of the story" get what suits you. I have a 6.5 on order because I wanted to exploit the range and accuracy not beause it may or may not be better than the 6.8. Hth
Keep in mind what they were designed for. The 6.8 is going to replace the 5.56 for military use EVENTUALLY. Bill Alexander designed the grendel for long range accuracy out or an AR. They both excel at what their intended purpose was. But this comparison thing is going through the roof with these new cartridges. Kind of like I get flack all the time from the .338 wm shooters about my .325 wsm. I like it. It was my choice simply because it was my choice. You can't compare a sprinter to a long distance runner. And that's "the rest of the story" get what suits you. I have a 6.5 on order because I wanted to exploit the range and accuracy not beause it may or may not be better than the 6.8. Hth
Re: 6.5 VS 6.8
223
77 SMK @ 2700FPS
600 yards
1504FPS 387FPE ETA 0.896sec Total drop 128.97in Wind deflection @ 10MPH 40.43in
6.8SPC
115 SMK @ 2600FPS
600 yards
1296FPS 429FPE ETA 0.992sec Total drop 153.06 Wind deflection @ 10MPH 52.74
IMO after analyzing the data above I would take a 223 with 77grs over the 6.8SPC easily. 1 foot difference in windage at 600 yards is 2 MOA. I think that a 6MM round of the same cartridge size that could fit inside the standard AR-15 magazines would beat out the 223 by at least the same margin.
223
77 SMK @ 2700FPS
600 yards
1504FPS 387FPE ETA 0.896sec Total drop 128.97in Wind deflection @ 10MPH 40.43in
6.8SPC
115 SMK @ 2600FPS
600 yards
1296FPS 429FPE ETA 0.992sec Total drop 153.06 Wind deflection @ 10MPH 52.74
IMO after analyzing the data above I would take a 223 with 77grs over the 6.8SPC easily. 1 foot difference in windage at 600 yards is 2 MOA. I think that a 6MM round of the same cartridge size that could fit inside the standard AR-15 magazines would beat out the 223 by at least the same margin.
Re: 6.5 VS 6.8
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BALLISTIC</div><div class="ubbcode-body">223
IMO after analyzing the data above I would take a 223 with 77grs over the 6.8SPC easily. 1 foot difference in windage at 600 yards is 2 MOA. I think that a 6MM round of the same cartridge size that could fit inside the standard AR-15 magazines would beat out the 223 by at least the same margin.
</div></div>
This is the reason why there is a 6.5 istead of the 6.8 and 223. The 6.8SPC was made/designed for the energy not for the accuricy. The 6.5G was designed for accuricy with the benefit of more energy out of the ar15 platform.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BALLISTIC</div><div class="ubbcode-body">223
IMO after analyzing the data above I would take a 223 with 77grs over the 6.8SPC easily. 1 foot difference in windage at 600 yards is 2 MOA. I think that a 6MM round of the same cartridge size that could fit inside the standard AR-15 magazines would beat out the 223 by at least the same margin.
</div></div>
This is the reason why there is a 6.5 istead of the 6.8 and 223. The 6.8SPC was made/designed for the energy not for the accuricy. The 6.5G was designed for accuricy with the benefit of more energy out of the ar15 platform.
Re: 6.5 VS 6.8
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BALLISTIC</div><div class="ubbcode-body">223
77 SMK @ 2700FPS
600 yards
1504FPS 387FPE ETA 0.896sec Total drop 128.97in Wind deflection @ 10MPH 40.43in
6.8SPC
115 SMK @ 2600FPS
600 yards
1296FPS 429FPE ETA 0.992sec Total drop 153.06 Wind deflection @ 10MPH 52.74
IMO after analyzing the data above I would take a 223 with 77grs over the 6.8SPC easily. 1 foot difference in windage at 600 yards is 2 MOA. I think that a 6MM round of the same cartridge size that could fit inside the standard AR-15 magazines would beat out the 223 by at least the same margin.
</div></div>
Again, you are using one of the worst 6.8SPC bullets (.324 BC) to compare against the best of the 5.56. Why not use the Hornady 110 Gr. BTHP (.360 BC), 110 Gr. V-Max (.370 BC), or the Nosler 110 Gr. Accubond (.410 BC)? From a 20" barrel, the MV is 2700 FPS. As you will see the drop will be identical to the 5.56 and the energy is much higher.
Also, are you aware that there are new GS Custom 99 Gr. SP bullet out specifically for the 6.8SPC with a BC .402? How about one of those with a MV of 2900 FPS? And a new GS Custom 99 Gr. HV bullets with a BC of .312?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BALLISTIC</div><div class="ubbcode-body">223
77 SMK @ 2700FPS
600 yards
1504FPS 387FPE ETA 0.896sec Total drop 128.97in Wind deflection @ 10MPH 40.43in
6.8SPC
115 SMK @ 2600FPS
600 yards
1296FPS 429FPE ETA 0.992sec Total drop 153.06 Wind deflection @ 10MPH 52.74
IMO after analyzing the data above I would take a 223 with 77grs over the 6.8SPC easily. 1 foot difference in windage at 600 yards is 2 MOA. I think that a 6MM round of the same cartridge size that could fit inside the standard AR-15 magazines would beat out the 223 by at least the same margin.
</div></div>
Again, you are using one of the worst 6.8SPC bullets (.324 BC) to compare against the best of the 5.56. Why not use the Hornady 110 Gr. BTHP (.360 BC), 110 Gr. V-Max (.370 BC), or the Nosler 110 Gr. Accubond (.410 BC)? From a 20" barrel, the MV is 2700 FPS. As you will see the drop will be identical to the 5.56 and the energy is much higher.
Also, are you aware that there are new GS Custom 99 Gr. SP bullet out specifically for the 6.8SPC with a BC .402? How about one of those with a MV of 2900 FPS? And a new GS Custom 99 Gr. HV bullets with a BC of .312?
Re: 6.5 VS 6.8
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bigwheeler</div><div class="ubbcode-body"> How do you get a 100 grn load to go 2900 in an ar15 platform? </div></div>
Out of a 20" barrel with RE10X, H332, H335, or X-Terminator. There are guys already getting 2900 FPS with a 110 Gr. bullet out of a 20" barrel with RE10X with 60K PSI (It was pressure tested).
If you have some time, download this PDF:
http://www.yuntaa.com/FileManager/Downlo...04400144FB7B71E
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bigwheeler</div><div class="ubbcode-body"> How do you get a 100 grn load to go 2900 in an ar15 platform? </div></div>
Out of a 20" barrel with RE10X, H332, H335, or X-Terminator. There are guys already getting 2900 FPS with a 110 Gr. bullet out of a 20" barrel with RE10X with 60K PSI (It was pressure tested).
If you have some time, download this PDF:
http://www.yuntaa.com/FileManager/Downlo...04400144FB7B71E
Re: 6.5 VS 6.8
I have seen loads with 10x @ 2800 published with a 100 grn. ( I think 28.5 grns and a 24 inch barrel) but had no idea guys had pumped them to 2900 with a 110. Makes the 6.8 quite a round.
I have seen loads with 10x @ 2800 published with a 100 grn. ( I think 28.5 grns and a 24 inch barrel) but had no idea guys had pumped them to 2900 with a 110. Makes the 6.8 quite a round.
Re: 6.5 VS 6.8
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bigwheeler</div><div class="ubbcode-body"> I have seen loads with 10x @ 2800 published with a 100 grn. ( I think 28.5 grns and a 24 inch barrel) but had no idea guys had pumped them to 2900 with a 110. Makes the 6.8 quite a round. </div></div>
Sorry, I edited my post above. With the right barrel and some RE10X, it is easily doable. Any 1:11" Twist SPCII or DMR Chamber barrel can do it.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bigwheeler</div><div class="ubbcode-body"> I have seen loads with 10x @ 2800 published with a 100 grn. ( I think 28.5 grns and a 24 inch barrel) but had no idea guys had pumped them to 2900 with a 110. Makes the 6.8 quite a round. </div></div>
Sorry, I edited my post above. With the right barrel and some RE10X, it is easily doable. Any 1:11" Twist SPCII or DMR Chamber barrel can do it.
