LVLAaron
Gold $$ Contributor
Did the 6mm Grinch fall into oblivion.
- Thread starter JBTech
- Start date
Sandstorm
Gold $$ Contributor
Thats perfect Sir.
Its what i was eluding to but didnt want to write a novel.
I agree with this article. The problem isn't with the case, nor with the AR15 platform..but with tipping the powder jug too far. The cartridge is more capable than the platform so you have to know and understand the limitations...and load accordingly. The cartridge likes pressure but the rifle does not, due to the additional bolt thrust generated by the larger case head(ID). For all intents and purposes, the ARC/Grendel bolt is just as strong as a 5.56 bolt but the bolt thrust is very different, thus the reduced psi max of those cartridges IN AN AR15. If you want to see the potential of these cartridges, do it in a bolt gun. If you prefer a semi-auto, then you have to load to pressure limitations of the gun and live with it.
A complete re-design of the weapon is what's needed in order to maximize the potential of these .440 case head cartridges, like it or not. And I don't see that happening, but I hope I'm wrong. The AR15/M16 is a well engineered and efficient design...for a 5.56 based cartridge. It was never intended to be used with the larger case heads and thrust they generate. Simple as that, imho.
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Buying factory ammo as not only a source of ammunition but for reloading brass. Depending on the day you can buy ammo, (Hornady Black 105) for about 25 cents more than components.
Never heard it said better. I wanted a CQB/General Purpose rifle for the truck, horse back or ATV, the AR15 platform in 6MM ARC fits that task for me, I don't want a beefed up (heavier) version.
I shoot factory loads and reloads that match the gas gun data from Hornady. I won't be building a 6MM ARC bolt rifle, I have a 700 Remington BDL in 6MM Remington for varmints it out classes the 6MM ARC bolt data by several hundred feet per second and given equal accuracy velocity is the king with chuck hunting.
the 6mm grinch is a wonderful cartridge out to 600 yards. as is the 6mm turbo and turbo imp, the 6mm rat and fat rat and standard 6mmar/243lbc. personally i don’t see enough gain fireforming brass for the turbos rats and grinch. i’ve been down that road twice and it’s just so nice to just neck down a 6.5 grendel lapua case and shoot a 6mmar/243lbc and get roughly the same performance. people get to caught in pressures and velocities. these cartridges are simply designed to out preform a 5.56 in the ar15 platform and they do it well. the fact is your only going to get so much performance from a ar15 before you get into lug or extractor problems.
I really appreciate all the comments and I get what you guys are saying,
I guess it’s just nice to dream once in a while I’m sure we all do that,
and talk about dreaming, @David Milisock mentions the 6 mm Remington,
well my first forte into reloading was for a Remington model 722 that I had acquired from my father that he had purchased new in the 50s, it was the late 70s, I was in high school, the rifle was chambered in 244 and I was all in for pushing this long range. I was experimenting around with 85, 90 and 100 grain bullets but little did I know, of course there was no Internet back then, it was just not going to be the shooter that I wanted it to be. I had such high hopes and yes I still think it’s the best 6 mm cartridge out there.
I just wanted something different in an AR platform
I guess it’s just nice to dream once in a while I’m sure we all do that,
and talk about dreaming, @David Milisock mentions the 6 mm Remington,
well my first forte into reloading was for a Remington model 722 that I had acquired from my father that he had purchased new in the 50s, it was the late 70s, I was in high school, the rifle was chambered in 244 and I was all in for pushing this long range. I was experimenting around with 85, 90 and 100 grain bullets but little did I know, of course there was no Internet back then, it was just not going to be the shooter that I wanted it to be. I had such high hopes and yes I still think it’s the best 6 mm cartridge out there.
I just wanted something different in an AR platform
Nothing wrong with doing one. I'd do either a straight 6 Grendel or a 6 ARC and just use it for what it is and don't try to get bolt gun speeds from it.
I will probably end up doing a 6 arc or maybe even design my own 6 for the AR15, I have an idea where nobody else has gone yet.
maybe I have not looked into the 6 arc enough but I’m just not seeing the accuracy, maybe I need to look farther than the YouTube warriors shooting stock ammo at an inch, inch and a half groups.
It's bound to shoot. It's so close to a ppc or a 6 Grendel, both proven to be two of the most accurate rounds out there. Both like pressure to be at their best though and we've already hashed that out. It'll still be better than most anything though, given good components and workmanship of the build. AR's are a little different animal in regard to the details that make them shine accuracy wise. The basics are the same...good bbls, triggers and ammo will get you 90% there.
DLT
Silver $$ Contributor
With a savage model 10 bolt gun, how would be a sure fire way to reliably feed a 6 grendel ? I have one not far from a rebarrel
If specifically a model 10, I'd look at a centerfeed mag setup and maybe compare it to the several model 110 and axis models that they offer in 6 arc currently. Obviously, you'll need a bolt head but beyond that, I'm not sure. The easy button would appear to go with one for a 6 arc or one that shares the same mag setup as they use for it, but for your m10
Kyle Schultz
Gold $$ Contributor
For the cases Whidden needs, all you need to do is neck size your fired brass. I used a 6 Dasher die I had laying around. That will be sufficient to allow you to rechamber the brass for another firing. I sent them 3 cases of 3X-fired brass. His dies work well. Good luck.
Cannot speak to the grinch in a AR platform, but in a bolt gun......If you are thinking 2900 f/s with a 103 from a 6 Grinch case capacity is "the norm", you better get ready to make a lot of brass.
The first grinch reamer I did had a FB length that would allow decent placement for both the 80 and 103 g bullets in that short neck. The 80's were married to a 12 twist, and the 103-105's in a 8 twist. Yep, the 103's shot great out to 500 yards, but you pay for that with primer pockets.
The first grinch reamer I did had a FB length that would allow decent placement for both the 80 and 103 g bullets in that short neck. The 80's were married to a 12 twist, and the 103-105's in a 8 twist. Yep, the 103's shot great out to 500 yards, but you pay for that with primer pockets.
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