CZ finally offers the 527 in 6.5 Grendel

Status
Not open for further replies.
I was gonna try jedi mind trick him into building it, thatll work right?

Honestly tho as much as id love a 7mm ppc (or 7 benchrest), on a mini mauser action, i think i will buy one of these grendels.
Nah, you guys are doing just fine. :D

Horsey, I was thinking what a 140-grain NBT could do out of a necked-down 7.62x39 case in a strong action. Would be a splendid hunting round inside 200 (easily carrying 1100 ft.lbs.+ at that range if started at 2250 at the muzzle) and isn't that really as far as you would want any new or young hunter to shoot anyway?
 
I understand. I think the 7.62x39 is sexy in a small bolt action.

I have two "training" guns that everyone I introduce to shooting, falls in love with. One is my vintage 1927 Winchester model 57 bolt action .22, and the other is my Savage model 10 in 7.62x39. We always run out of ammo for those two rifles.

Soon I'll be adding a Savage 93r17 to that list for longer (than 100 yard) training. These are inexpensive and fun to shoot rifles that are just ideal for introducing folks to hunting and marksmanship.
 
I may or may not have drooled a little whilst simultaneously wetting myself in excitement at the 7 Gunner.
hahaha... same happened to me when I was making it.
the biggest issue with the AR15 is to get the proper bolts and extensions.
I was lucky to secure a number of them for future projects but not sure what the situation is right now.
I heard of a patent parasite who stole the design form AR performance and filed patent so he now wants to monopolize on this.
I believe the solution is simple but it is not for everyone. Get a large custom order like a large group to offset costs and get those properly made,
ideally by someone who knows what they are doing. One cannot use the 458 bushmaster bolts. They will break but you might already know that.
This is a problem that affects all wildcats in the .473 bolt face like those BR or derived form 308 or even this larger one derived from the 284.
After that is resolved, the sky is the limit.

With the bolt action or AK we don't have that problem.

the 7mm Gunner cases give a lot of space and they are very strong cases courtesy of the 284 donor...
7x40_ARcases1.jpg


Needless to say they need neck turning but other than the forming and neck turning there is nothing too special about this.
ASC and PRI magazines are preferred as they can house 2.3 COAL even if they need a bit of conditioning in the vise.

The round likes 4895 and leverevolution. 120gr scream with benchmark. Red is too hot. Blue is accuracy load.

7mm_Gunner_Range_Report01.jpg
 
Last edited:
Nah, you guys are doing just fine. :D

Horsey, I was thinking what a 140-grain NBT could do out of a necked-down 7.62x39 case in a strong action. Would be a splendid hunting round inside 200 (easily carrying 1100 ft.lbs.+ at that range if started at 2250 at the muzzle) and isn't that really as far as you would want any new or young hunter to shoot anyway?
Without getting offensively bold, yes that would work, but not something I'd put in the hands of one of my kids (and the oldest has been practicing hard for the last year with a .223 and .243 hoping to hunt next year) until I had tested the living whiz bangs out of it. My ideal deer pills may or may not get recovered, but when they do, they leave about %50 mass behind because I want the energy shock. I can track and I have dogs to help but that's not how I want her first hunt to go. All that energy does no good in the dirt on the far side pinholing through the vitals. You break a bone and that's different. With a 110 ttsx at a very conservative 2650, you're looking at 2100+ fps and 1099 energy at 200. That bullet will break bones and pass through and at 2100 it will create QUITE the cavity. A 120 btip I've already computed and that looks favorable as well, Sierra offers a 120 soft tip. In all the deer I've hunted, only 2 were whitetail, all the rest were these invincible muleys that can't be killed with anything less than a .270. Deer do not take much to kill. If I put a kid on a deer I want more shock and awe to allow for a better follow up if needed. The btip WILL open at 1800 and WOULD work for deer, but they're more destructive fast and even at muzzle you won't exceed the limits and risk shattering it. Put hogs on the menu and I'd say you're right on for penetration purposes, but deer run away from you not towards you, and if/when the kid isn't dead center of a .75" dot over the heart, I want the shock and shrapnel to help. I like having enough energy to get the job done but lighter weights with proper construction (might still avoid the varmint HP and vmax) will buck even less and they'll still do the job fine. If you or I were taking the shot I'd be less worried.
ETA look at nosler demo page for the pic of btips at each stage of impact velocity. This is why the lightweight in the Grendel in the cz appeals so much. 999 ft-lbs energy is nothing to joke about and plenty of impact velocity to cover a kid's buck fever.
https://www.nosler.com/ballistic-tip-bullet/
In a .308 at 200 or less I'd try to copy the DRT sinter bullets for a kid.
 
Last edited:
Good points. My new hunter the other day was not very excited when the doe she shot ran off out of sight. Although she only went 40 yards, that was 40 yards further than she was hoping for. And that is why I have started experimenting with lighter and faster in my x39
 
Wait no, the BR case is shorter if i remeber correctly.

Yes, the BRis the one on the right in #60 but not sure how much difference that makes. Just face the barrel off that much before you rechamber.

The technical deficiencies of the 6.5 Grendel are simply something those considering buying one should be aware of.

In a mini bolt action, the 6mm BR, Dasher etc. are far superior both for punching paper and medium game hunting.

I am thinking your definition of "far" and mine are not the same.
 
Reviewed the posts. Savage lightweight hunter is 5 1/2 pounds.

And a "must own" rifle for me someday, although my current Savage SA model 10 with a tupperware stock weighs in at 7 lbs., scoped and fully loaded.

But the stainless lightweight hunter with a wood stock is truly drool-worthy IMO
 
I am thinking your definition of "far" and mine are not the same.

Well here's my definition. A 6mm Dasher will shoot a 90gr Scirocco (a very viable deer, goat, sheep, antelope and even black bear bullet) at 3200 ft/s out of a 22 inch barrel with a +-3in point blank zero of 325 yards and plenty of terminal performance out to 400y.

Show me that kind of performance out of a 6.5 Grendel and we can talk. But I don't think it's possible. There aren't a lot of medium game SD bullets available in 6.5 for starters (mostly Barnes 120gr copper and a Core Lokt) and for those that are available, I don't think they can be safely driven at more than about 2600 ft/s out of a 22in barrel. That drops your maximum PBM to about 275y.

So basically one's a top notch deer laser, and the other has a trajectory reminiscent of a trebuchet. Now maybe there's some magic formula for 6.5G that gets similar performance (say a premium bullet with a SD > 0.215 at > 3000 ft/s) and if so please enlighten me. But from where I stand it looks like a 600 ft/s speed difference for bullets of similar terminal performance. And I call that far superior.
 
ughh....you had to post that now didnt you.....simple opening of the bolt face, and rechambering of the barrel to the BR cartridge would likely work on a grendel CZ no?
Wait no, the BR case is shorter if i remeber correctly. I like the look of the 7 Gunner, maybe in a model 7 action, which i happen to have a friend who has one......

Similar to overpressure loads, wouldn't using a cartridge with a larger case head increase backward thrust? These Mini actions, at least the Howa I'm 100% certain, have smaller lugs than their short action counterpart. It's not like Savage's 7.62x39 that's built on a conventional short action and designed to handle WSM pressures.
 
In a mini bolt action, the 6mm BR, Dasher etc. are far superior both for punching paper and medium game hunting.

I wasn't aware that any mfg's were offering off the shelf bolt guns in those cartridges other than BR rifles. How do you hunt with a BR rifle? A bit heavy isn't it?

The two cartridges you mention aren't real popular. When companies build a certain rifle they try to find a cartridge that's popular or the rifle won't sell. That's what CZ and Howa are doing with the minis. Howa's are available in .204 Ruger, .222 Rem., .223 Rem., 6.5 Grendel & 7.62x39. The first two are popular varmint cartridges. The last three work in AR's and AK's. There's a huge market for people who already have ammo or load for those cartridges. The reason I purchased a Howa mini isn't because I'm in love with the cartridge, although it works pretty well for varmints, it's because brass is free and good bullets are inexpensive. 6.5 Grendal will become a popular cartridge if for no other reason than it affords an AR owner the opportunity to beef his rifle up a little to take deer sized game. .223 is illegal in some states for deer. It is in my state. When the military gets around to buying a new rifle, chances are good the hole in the barrel will be 6.5 mm.
 
Last edited:
Similar to overpressure loads, wouldn't using a cartridge with a larger case head increase backward thrust? These Mini actions, at least the Howa I'm 100% certain, have smaller lugs than their short action counterpart. It's not like Savage's 7.62x39 that's built on a conventional short action and designed to handle WSM pressures.

This is true, and im not sure how far you could hotrod one of the minis. Id be interested in finding out, id also be interested in how their lug surface compares to an ar.

Brs hold slightly more powder so in theory you wouldnt need to run pressures as high to achieve similar velocity.

I'd really like to see the 7 Gunner in a ultralite model 7.
 
I wasn't aware that any mfg's were offering off the shelf bolt guns in those cartridges other than BR rifles.
You're missing the point - 6mm Dasher is a superior cartridge for the application in a mini-action, flat out. So that's the custom side of things.

On the factory side, the CZ offering is so overweight as to be substantially larger and heavier than similarly priced and featured rifles using .308 size cartridges. So the 6.5 Grendel loses on the factory side of things.

Factory, custom, auto, bolt - doesn't matter. The 6.5 Grendel manages to lose wherever it goes :D
 
Isnt the Dasher basically an improved 6BR? Im curious about this one too, but as a 6.5
 
Isnt the Dasher basically an improved 6BR? Im curious about this one too, but as a 6.5

Yes - it's basically blown out 6BR brass. You can now buy Norma brass as well. The Norma brass has a slightly longer neck, which from a technical POV is probably an improvement, but does require an appropriate chamber.
 
I should mention that while the idea of 6.5mm Dasher has some market share, it's definitely in wildcat territory and would require custom dies whereas 6mm Dasher is pretty well supported.

Personally, I think mini-action cases do best from a performance perspective with bullets no bigger than 6mm. There's just not enough powder to justify an increase in bore diameter - the burn rates are right in the ideal spot with the 6MM (IMR 4895 is a top performer). Go to a short action case, and 6mm vs. 6.5mm starts being more of a wash. Go to a long action or short magnum case, and 7mm starts coming into its own.
 
Very cool. Im mostly interested in shooting 100-120 grain hunting bullets which is why i like the idea of the 6.5s or 7s
 
Isnt the Dasher basically an improved 6BR? Im curious about this one too, but as a 6.5
You're considering the savage kids......check out the 7ihmsa....maybe take it one farther to the 6.5 for better bc.....300 Sav necked down and blown out....... 7IHMSA-7BR-2.jpg

The little one is the 7br for reference.
 
Hahahahaha, you WILL wildcat!!!!
You're considering the savage kids......check out the 7ihmsa....maybe take it one farther to the 6.5 for better bc.....300 Sav necked down and blown out.......View attachment 228100

The little one is the 7br for reference.
Funny you should mention that one. I considered the 7 for my savage 11, going to 6.5 would be similar to my creedmoor i think.
 
Hahahahaha, you WILL wildcat!!!!

Funny you should mention that one. I considered the 7 for my savage 11, going to 6.5 would be similar to my creedmoor i think.
Move a 120 with a Max load of blc-2 put you right about 2750???? That's just under 7-08 performance with same weight... and just under the middle performance of a 120 cm, think middle ground between Grendel and .260/cm

"You will wildcat" Sir I have no idea what you mean!
ETA with a little heavier 130 Max speed close to 2600 all of this on a 22" bbl obviously. And calculated without the blown out shoulder, add maybe 10-15%?
 
Last edited:
You're missing the point - 6mm Dasher is a superior cartridge for the application in a mini-action, flat out. So that's the custom side of things.

On the factory side, the CZ offering is so overweight as to be substantially larger and heavier than similarly priced and featured rifles using .308 size cartridges. So the 6.5 Grendel loses on the factory side of things.

Factory, custom, auto, bolt - doesn't matter. The 6.5 Grendel manages to lose wherever it goes :D


Not missing anything.

Where are the light weight bolt rifles in sporter stocks that you mention in BR and Dasher? Where are the barrels to convert an AR to one of those cartridges? There are plenty of wildcats that didn't make it commercially. I can have a smith build darn near any rifle I want in darn near any cartridge I choose but where's the ammo for those cartridges you mention? Sure, you might find it for $2/rd but I like to shoot a hundred rounds a week. What's that, $200 for a weeks worth of ammo. This may come as a shock to you but not everyone reloads or builds custom rifles. The average shooter wants a $700 off the shelf rifle they can take to the range and hunt with. That's a bolt gun or an AR. Hence the Grendal.

If it's such a loser cartridge than why are rifle mfg's building rifles for it? Not seeing many BR or Dasher rifles out there.
 
Last edited:
Not missing anything.
Yeah, actually you are. 6mm Dasher is a CUSTOM option. The superior factory offering is the Savage Lightweight Hunter in .243, .260 or 6.5CM. It's smaller, lighter, probably more accurate, and chambered in much more capable rounds. If you're trying to figure out how to shoot a superior factory rifle cheaply, that's your solution.

Shooting 6mm Dasher with Norma brass is actually very cheap once you buy the rifle BTW - the brass is about $1/case and lasts about 10 uses. Charge weights are in the 35 grain neck of the woods, so you're looking at a total of about $0.25 of components outside of the bullet depending on exactly what primer and powder you choose. There's really not much else with that level of performance that is so cheap to shoot.
 
Status
Not open for further replies.
Back
Top