6mm Grendel 1000 yards

[Ledd Slinger]

@Ledd Slinger do you have the fireformed water capacity of the 6 LBC? (... and how does it compare to the Dasher?)

An impressive looking little cartridge and a great project for 6mm lovers!

I just checked one case of each real quick to give a general idea. The 6 LBC is not the same case as the 243LBC T40. The Turbo 40 has the shoulder blown forward like a Dasher for additional capacity. My T40 brass was Fireformed from Hornady 6.5 Grendel cases.
I also have a bunch of Norma 6 PPC USA I could try but I’ve been saving those for my new 20 PPC.
Ultimately I need to get some Lapua 6.5 Grendel cases to form the T40 rounds.


243LBC T40 (Fireformed Hornady)
Capacity: 36.3 gr






6mm Dasher (once fired Alpha brass)
Capacity: 40.3 gr

 

[JavmanSTX]

Back years ago I purchased one of Robert's 6mm AR and seriously that thing would shoot great all the way to 600 yds. I never tried any further cause that's all I had at the time.

I'll get out this weekend to take velocity and group size readings. Unfortunately we spent this weekend chronographing my buddies 338 lapua for an upcoming Nilgai hunt. This was interesting as we were shooting 250Lapua slugs and got 2983 fps and 2930 FPS with 265 ABLRs with no signs of pressure using R26. Sorry for getting of track here but it was fun shooting that 338.

 

[6fatrat]

I get low 2800's with 105's in my 6 fatrat AR match rifle, 26" barrel.
Steve Bair

 

[JavmanSTX]

I'll get out this weekend to take velocity and group size readings. Unfortunately we spent this weekend chronographing my buddies 338 lapua for an upcoming Nilgai hunt. This was interesting as we were shooting 250Lapua slugs and got 2983 fps and 2930 FPS with 265 ABLRs with no signs of pressure using R26. Sorry for getting of track here but it was fun shooting that 338.

Ok went out today and avg was 2683 FPS sd 20, groups were sub moa. The 80gmx showing some interesting results 2993 FPS sd 29 and I'd get two touching and a flier, probably me. Pic of rdf .

 

[JavmanSTX]

So in my 6GR I've got it setup in a BCM receiver, which I'm impressed with how it hugs the barrel, and my barrel is an ARP 22" fluted .750 at muzzle. Bought it used and like how light it is and is easy to carry.

 

[Ledd Slinger]

Here’s a couple 3 shot groups and one 5 shot group I fired with the 243LBC T40 at 100 yards when doing initial barrel break in and forming some brass. These were just a couple random loads I threw together real quick just to see if it had potential. The other rounds were just fired into the dirt. Looks like it will shoot pretty decent.

Need to do some serious load development with it now.

 

[Stan Taylor]

Here’s a couple 3 shot groups and one 5 shot group I fired with the 243LBC T40 at 100 yards when doing initial barrel break in and forming some brass. These were just a couple random loads I threw together real quick just to see if it had potential. The other rounds were just fired into the dirt. Looks like it will shoot pretty decent.

Need to do some serious load development with it now.

View attachment 1224535

View attachment 1224536

View attachment 1224537

What's your parent case.

 

[Ledd Slinger]

What's your parent case.

That was shot with Hornady 6.5 Grendel parent brass. Planning on turning it into a LR target rifle instead of a varmint rifle so I want to pick up some Lapua 6.5 Grendel brass as soon as I can find it in stock somewhere.

I was going to expand the necks on some Norma PPC brass then size back down to set a false shoulder and fireform but Norma primer pockets aren’t any tougher than Hornady and I want to keep that brass for my 20 PPC.

I think the rifle will shoot well with prepped and sorted Hornady brass, but I’ll never be able to push speeds without ruining proper pockets prematurely

 

[JEFFPPC]

Several years ago I install a new 6PPC barrel on one of my bench guns in an 8 twist. My interest was matches out to and including 500 yds. Long story short, shot some ok groups with 105 class bullets but.....it was not competitive with any of the BR case as various rounds. Now, could it be an upgrade in an AR style gas gun, perhaps. But, in bolt guns in bench games it's a dead end. Now this is from a guy who regularly competes at 500 yds with a PPC shooting 65 or 68 gr8 bullets. Hope this saves someone some money.

 

[Ledd Slinger]

Several years ago I install a new 6PPC barrel on one of my bench guns in an 8 twist. My interest was matches out to and including 500 yds. Long story short, shot some ok groups with 105 class bullets but.....it was not competitive with any of the BR case as various rounds. Now, could it be an upgrade in an AR style gas gun, perhaps. But, in bolt guns in bench games it's a dead end. Now this is from a guy who regularly competes at 500 yds with a PPC shooting 65 or 68 gr8 bullets. Hope this saves someone some money.

Yeah but the straight PPC case is significantly smaller in capacity than the 6 Grendel or LBC T40 rounds we are talking about. And even smaller yet compared to the BR or Dasher. The BR case is great but not really talking apples to apples when comparing it to the much smaller PPC in terms of longer ranges with heavier bullets.

Some of the improved Grendel cases are fairly close to the BR in capacity so they are a better comparison

 

[JEFFPPC]

Yeah but the straight PPC case is significantly smaller in capacity than the 6 Grendel or LBC T40 rounds we are talking about. And even smaller yet compared to the BR or Dasher. The BR case is great but not really talking apples to apples when comparing it to the much smaller PPC in terms of longer ranges with heavier bullets.

Some of the improved Grendel cases are fairly close to the BR in capacity so they are a better comparison

I agree on all points. But it seems the line for being competitive if we are talking 1000yds has been pretty well established at the 6br case.I fail to understand trying to reinvent the wheel with a smaller case which seems to be the objective. Or perhaps you could tell me what the practical objective is. Maybe the objective is not to be competitive simply to be different. I guess that is ok if that's what trips your trigger.

 

[Ledd Slinger]

I agree on all points. But it seems the line for being competitive if we are talking 1000yds has been pretty well established at the 6br case.I fail to understand trying to reinvent the wheel with a smaller case which seems to be the objective. Or perhaps you could tell me what the practical objective is. Maybe the objective is not to be competitive simply to be different. I guess that is ok if that's what trips your trigger.

That’s what they said about the Dasher when the 6.5-284 and 308 Baer were ruling 1K BR.

And now a lot of people have gone even smaller than the Dasher with the BRA. Others are playing with .100” short 47 Lapuas.

Improved Grendels might be competitive, might not. It’s just fun to mess around. Cool varmint round if nothing else

 

[tom]

I've seen improved grendel 6mm’s compete just fine. I think he was running 4895 and the node with 105s was about 2920ish. I've seen record aggregates at 1k shot with a BRA and DASHERS at that same node.

Tom

 

[457ciSBC]

Others are playing with .100” short 47 Lapuas.

Inching its way back to the cartridge that is the grandfather of all the newer long body comp cartridges......6x47 Swiss Match

 

[rayporter]

i have been thinkin of spending my stimulus on ab 8 twist and getting a 6 grendel just cause i have a ppc bolt in the rifle

 

[buddha]

I have an old nesika j br rifle I haven't shot in ten years. Having an 18 in. 8 twist magnum contour grinch being built on the action. Will go in a varminter stock. Just for fun, will pack it and shoot off bipod suppressed.

 

[tplace]

Been working on my 6mm Predator which is a 6mm Grendel and was working on OAL and ogive length for my ARP barrel and I'm at 2.348" right at the lands with the Nosler 105s. Hopefully will be finishing build here quick.

I realize this is an old post but I'm curious, is the 6mm Predator the same as the 6mm Grendel?

 

[gunsandgunsmithing]

I realize this is an old post but I'm curious, is the 6mm Predator the same as the 6mm Grendel?

I think they are the same but not positive. There are too many names out there for this cartridge to keep up with. The problem originated from Bill Alexander getting trademark protection for the term "Grendel", as it pertains to a firearm cartridge name. He has since released that protection, from what I understand, but the damage was already done. Great little cartridge though. I love mine in a bolt action BR rifle. Actually more than one. I've had some good success with it.

 

[uncle fester]

Robert Whitley has some terrific ideas on cartridge calibers. You speak of the 6mm Grendel. He has that called the 6MM AR. It takes the 6.5 grendel case and necks it to 6mm. It is so light in the die you will miss it if you are not paying attention. It shoots terrific. So well, in fact, the US Military just adopted it as 6mm ARC with a 0.0030 shoulder reduction. I’ll stay with my 6mmAR. Look it up at www.6mmAR.com.

A 6ARC is basically a 6mm Grendel. I liked my gas gun so much I recently bought a Savage bolt gun. I don't have access to a 1000 yard range and haven't tested it, but my ballistics calculator states it would still be supersonic at 1000 yards.

 

[gunsandgunsmithing]

A 6ARC is basically a 6mm Grendel. I liked my gas gun so much I recently bought a Savage bolt gun. I don't have access to a 1000 yard range and haven't tested it, but my ballistics calculator states it would still be supersonic at 1000 yards.

Not the same but close. The Arc is pretty much in between a 6 Grendel and a 6 PPC