6.5 G vs 308 Ballistics

[Von Gruff]

Same over here Adam with the 6.5x47 getting more mention, among those I have contact with anyway.

[Y85]

Not wanting to high-jack the thread, but (to Adamjp and any with experience), what do you think of the March scope? I am thinking of getting one (for a 6.5CM).

[dukeboy_318]

If someone can tell me how to upload a 44.kb PDF file on here, I've got a really nice chart that shows the comparison between 308 and 6.5 Grendel. I just dont know how to upload it on here

[dukeboy_318]

nevermind, here

https://docs.google.com/file/d/0B8-DtTwx23xaWnV5VjlEU0o1aXc/edit?usp=sharing

[cory]

If someone can tell me how to upload a 44.kb PDF file on here, I've got a really nice chart that shows the comparison between 308 and 6.5 Grendel. I just dont know how to upload it on here

Convert just the chart to a JPEG File.

Barney Style Instructions:
In the pdf go to the edit tab and select snapshot

Drag your mouse from one corner of the chart to the opposite corner.

Right click what should be highlighted in blue now and click copy.

Open the paint program.

Click in the center of the page in what should be a white open canvas.

Press control + v The chart should be pasted to paint now.

Click on the file tab, then save as.

At File Type, select JPEG

Name it, click ok and you should have a file small enough to upload.

[Keep The Change]

http://www.shootingtimes.com/2012/11...ought-to-have/

Thanks a lot XCR

[Keep The Change]

nevermind, here

https://docs.google.com/file/d/0B8-D...it?usp=sharing

Thanks Dukeboy. I had just found this chart late yesterday. Very informative for my novice self. Unless you're using the 175g 308, the Grendel is the way to go in terms of energy and velocity at the long long ranges. Obviously it is considerably much better at the mid ranges in terms of energy, velocity and the like for the hunter.

For my purpose as a target gun on an AR platform, it is an obvious choice for me. There maybe times where I can do some hog hunting at some distance and it should do just fine.

[LR1955]

Thanks Dukeboy. I had just found this chart late yesterday. Very informative for my novice self. Unless you're using the 175g 308, the Grendel is the way to go in terms of energy and velocity at the long long ranges. Obviously it is considerably much better at the mid ranges in terms of energy, velocity and the like for the hunter.

For my purpose as a target gun on an AR platform, it is an obvious choice for me. There maybe times where I can do some hog hunting at some distance and it should do just fine.

KTC

Is there a Grendel load that will outperform a (.308) 155 Match King at 2850 fps? If so, what is the load?

LR1955

[bwaites]

KTC

Is there a Grendel load that will outperform a (.308) 155 Match King at 2850 fps? If so, what is the load?

LR1955

That's a bit of an apples/oranges comparison isn't it? Unless someone is shooting an AR10 with a long barrel to get that velocity. I know that the F Class and Palma guys get it, but they use much longer barrels than typical of AR's. The guys I know shooting AR10's with 20" barrels are more in the 2650-2750 FPS range.

I'm close to 2700 FPS with my 28" Grendel and Factory AMAX Hornady ammo, but I'm not quite there with 155's pushed at 2850. (And yes, my 28" is atypical in length!)

[Keep The Change]

KTC

Is there a Grendel load that will outperform a (.308) 155 Match King at 2850 fps? If so, what is the load?

LR1955

I think you may have misunderstood what I was trying to say with the sentence, "Obviously it is considerably much better at the mid ranges in terms of energy, velocity and the like for the hunter". I was actually refering to the 308 with that sentence. There is no argument that energy advantage goes to the 308 from muzzle to 500-600 yds but the Grendel becomes very appealing out past that. This coming just from looking at ballistics and not from experience.

But for the really long range, AR-15 platform, lighter weight, flatter shooting, I would go with the Grendel.

[mongoosesnipe]

KTC

Is there a Grendel load that will outperform a (.308) 155 Match King at 2850 fps? If so, what is the load?

LR1955

do we get to put the Grendel into a bolt gun with a 26"+ barrel

[KentuckyBuddha]

If you do a bolt Grendel, why not just a bolt .260 and be done with it? I figured the only point of the OAL of the Grendel was that it was to fit in an AR. If it is truly an apples to apples same case and all you change is the projectile...I reckon the 6.5 would shine much brighter past 600 no?

[mongoosesnipe]

If you do a bolt Grendel, why not just a bolt .260 and be done with it? I figured the only point of the OAL of the Grendel was that it was to fit in an AR. If it is truly an apples to apples same case and all you change is the projectile...I reckon the 6.5 would shine much brighter past 600 no?

I concur that if our going to build bolt gun you can obviously build something more powerful but the question was Grendel vs 308 and the the cartridge can be pushed harder in a bolt gun I read an article a while back and in a bolt gun the were able to fire 142 matchking at 2700fps

[bwaites]

If you do a bolt Grendel, why not just a bolt .260 and be done with it? I figured the only point of the OAL of the Grendel was that it was to fit in an AR. If it is truly an apples to apples same case and all you change is the projectile...I reckon the 6.5 would shine much brighter past 600 no?

Recoil!

Inside 400 yards, the Grendel has plenty to take everything up to Elk with proper shot placement. 90+ percent of all hunting kills are well inside that range. Thus the Grendel is plenty.

The only place I see a huge advantage to the .260 is beyond 600 yards, either for target or hunting. If you are staying inside that, a Grendel bolt gun makes a lot of sense. You are burning 30 grains of powder vs 40-45 and getting very close to the same real world performance. Beyond 600 yards, I think you really want to make the step to the .260/6.5x47/6.5 Creedmoor. But even there, I think you reach a point around 800-900 yards where the step to the 60 grain cartridges like the 7mm WSM or 6.5x284 makes sense. Beyond 1200 yards, you are into the RUM/Lapua .338 world.

So, in my mind....Grendel to 600 for most uses, 6.5 45 grains of powder variant to 800-900 yards, then 6.5 or 7mm variant using 60-70 grains of powder out to 1200, and beyond that that 90-100 grains of powder and heavy bullet RUM/Lapua mag cartridges.

[LR1955]

I think you may have misunderstood what I was trying to say with the sentence, "Obviously it is considerably much better at the mid ranges in terms of energy, velocity and the like for the hunter". I was actually refering to the 308 with that sentence. There is no argument that energy advantage goes to the 308 from muzzle to 500-600 yds but the Grendel becomes very appealing out past that. This coming just from looking at ballistics and not from experience.

But for the really long range, AR-15 platform, lighter weight, flatter shooting, I would go with the Grendel.

KTC:

No, I understood what you were saying. We go through this argument once or twice a year on the forum.

If you want something to perform at longer ranges using an AR platform, the various Grendel cases necked down to 6mm will outshoot any Grendel load made today.

LR1955