Comparing 6.5 Grendel to .260 Remington

[bwaites]

There is a .20 Grendel, bolt gun. Being considered for AR's.

[Trooper]

Kind of a long shot, but does anyone have any velocity data for similar weight/the same bullet shot out of a 16" barrel for both 6.5 Grendel and .260 Remington?

I'd like a shorty bolt action rifle for bushwhacking, and would like it in some 6.5mm cartridge. I know that out of a longer barrel, the .260 gets better velocities than the 6.5 Grendel, which is to be expected due to the .260's greater case capacity.

But what about out of shorter barrels? Would I still see better velocities out of the .260 with a 16" barrel, compared to a Grendel? Or would I see about the same velocity with more muzzle blast and more wasted powder out of a .260?

I've tried searching, but haven't found anything on the web comparing these two. Not surprisingly, most people stick to longer barrels and heavier bullets for the .260, so I'm having a hard time finding an apples to apples comparison of velocities between the two.

http://www.eabco.com/6.5_mm_cartridges.html

The .260 Rem (6.5x51), as with the 6.5 Creedmore or the 6.5x47 Lapua, fits in the .308 type actions. The .260 Rem is based on the .308 case. And all of these rounds are designed to be fired out of a 20" barrel rather than a carbine length (16").

The standard of comparison is the 6.5x55 Swede which pushed a 140 gn. bullet at 2500 fps out of the barrel.

The 6.5mm has a BC of .600 which is normally only matched by the .338 (8.6mm): .338 Lapua Mag (8.6x70, 250 gn) or .338 Norma Mag (8.6x63, 300 gn)

[mickey]

wally, I also like short rifles. I hunt with a 6 mm & 6.5 Rem mag. in 600 Remington,a rifle 60 years a head of its time, if the had mad a left bolt i would be looking for in one for Belle to re-barrel to 6.5 Grendel. Both rifled groped beter with hot loads, maybe it was the 18 barrel. this short action was unique in that the trigger was under the action, not behind it.

[LRRPF52]

For me and my AR15 16" Grendel vs. AR10 22" .260 Remington using the 123gr A-MAX, it equates to this:

8.6lbs total system weight, 1200yds capable in my summer at 4400ft elevation vs.

14lbs total system weight, 1400yds capable in same conditions

One I can buy factory ammo for at ~$19-24 per box, the other will probably never see factory ammo. The Grendel takes 31.0gr of powder, while the .260 Rem takes 41.0gr of powder.

[BluntForceTrauma]

The Grendel will have less recoil, and consume less power.

And so it seems LR has finally ushered us into the era of the "phased plasma rifle in the 40 watt range"? Just how much less power DOES it consume?

John

[bwaites]

And so it seems LR has finally ushered us into the era of the "phased plasma rifle in the 40 watt range"? Just how much less power DOES it consume?

John

It consumes 10 grains less power (sic) per shot, which is equivalent to 100 plasma/decajoules. Therefore, it is hermetically guaranteed to singe less than the phased plasma rifles now available!

[NugginFutz]

I'm not sure, but assuming no better than 20% efficiency, probably about 800 watts of input power.

[nincomp]

I am done playing with plasma rifles. I bought one of the early models (before the new MR.FUSION power packs were available). I also was limited to stay near roads because the 872 car batteries needed to power it are a pain to move around. As it turns out, I only shot it once. I tripped and fell and the damned thing went off.

You probably know that on several of the NASA moon missions the astronauts left behind mirror arrays so scientists on earth could bounce light of them for some reason or 'nother.

Well, this is what happened, no shit: That there plasma burst hit one of those mirrors thingies. That mirror must have been messed up by one of those Air Force guys that live in the secret base up there (I ain't supposed to know about it ...but I do). Well, that mirror, thank goodness, bounced that beam back to Earth about 15 miles from here (If it had toasted me, I'd been real mad). 'Course I didn't know anything about that at the time.

Well, that night on the TV they had a big story about some farmer who said that some of them space aliens probed him (I won't tell you where them probes went). Then they went up into space and fired some kind of super-duper raygun at his farm. Turns out that damned plasma blast ricocheted off of one of those moon-mirrors and blowed up a barn, three out-buildings, seven beat up old cars hidden in the tall grass and - now I ain't kiddin' - that farmers favorite outhouse.

That was when I buried the damned thing in the back yard.

Now I told you that story so's I can tell you this one....
That farmer said that he wasn't gonna let them space aliens probe him again, so he went out and got hizzself a brand new riflegun. And guess what it was. That's right, a 260 with a 16 inch barrel.
How's that for a coincidence!

[cory]

^^^^^^bahahaha roflmao Silly farmer. Why didn't he just get a Grendel.

[NugginFutz]

I am done playing with plasma rifles. ...

Now I told you that story so's I can tell you this one....
That farmer said that he wasn't gonna let them space aliens probe him again, so he went out and got hizzself a brand new riflegun. And guess what it was. That's right, a 260 with a 16 inch barrel.
How's that for a coincidence!

Way to return a hijacked thread back to the topic, and be entertaining at the same time.

Nicely done.

[nincomp]

I mostly just like short, handy rifles. I know with .308, going shorter than 18 inches really drops velocity and makes huge fireballs.

The 260 will likely be worse, since it is based off the .308 but has less volume inside the barrel for the burning of the powder.

It is telling that in the article about the short-barreled .260, the owner wanted to put a sound suppressor on it.

[Rambozo]

I say get the one that gets the job done without being anymore than you need it to be. In a small handy rifle, little intermediate cartridges are nice. I say do Grendel.

If you need the ballistics, then do .260. The .260 uses a more common bolt face, and uses .308 headspace gauges. So if you already got those parts, then something based off of that case head would probably be a good idea. As far as that goes, there are the BR cartridges too.