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This speaks to me as I did this, as well I watched other cartridges misstep over the years. Having gone down the Valkyrie route, and I like the Valkyrie, it showed the 22s work, they just need speed vs some of the other calibers. The handicapped it at 2750, and now that the 80s go 2900fps and they offer lighter faster options, it's dead. I feel the same way with the 6.5Grendel, it never worked, I watched dozen try it initially and it never worked as advertised and that is the key factor, as advertised. With ease we got the Valkyrie to work but too late.

Now, when they announced the 6ARC I was like, not this time, I am waiting. At the same time the Arc dropped the 6GT did as well, different missions, similar numbers to make you wonder, but that small frame AR size was the difference.

Initially and I still have the images, the numbers I saw were too slow for me, I said, same as the Valk, so I waited and went 6GT with a boltgun. View attachment 8696835
This was a no go for me, but figured time would tell.

Fast foreword to today and things have improved, we now have a solid variety of ammo, at a good swing of speeds. Some of it is still 2750fps, but other stuff is much faster. We can make this work, and we know handloading is key to getting what we need.

View attachment 8696836

The 80s, its in the 80s, going 3000fps, that is the sweet spot when we need it, as well the gas gun stuff with the ammo goes 2885fps. All good numbers where they didn't try to squeeze it all in a box. They have variety.

Rifle is built, I am hoping the barrel speeds up a little, which it might, i have barely 80 rounds through it, so maybe it will speed up a touch which would be the easy button.

Everyone I spoke to likes it, all the side adjacent military guys using it, like it, so there is some lifespan here.
View attachment 8696840

So far the best numbers are with the 103gr ELDX, really good downrange results with them.

View attachment 8696841

So I'm in the early days, honeymoon faze with the 6ARC but I like it alot so far
Hmmmm...great. Now I'm thinking of pulling my Valk barrel and getting an SPC/ARC bolt head.

It's a sickness...smh. :D
 
Was out again today trying to get rounds through the rifle so I can see if the barrel speeds up any, I smoked a few prairie dogs and then played with the 103 and 108,
IMG_1042.JPG


Really good results, Gravity Ballistics to distance and had solid factory numbers

IMG_1039.JPG


I really like the 6GT, I can grab an upper, but when you consider small frame AR stuff is a touch cheaper...

80gr 6ARC Out of my Bear Creek Arsenal 18" is 2885fps, that smacks the plate just as well
 
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First attempt at reloading for this rifle (only loaded 10 rounds), it doesn't like the factory Hornady (1.2MOA or so), but the handloads seem to be very promising.

Best part about it is I'm using Hornady Brass, Hornady Bullets, Hornady Press, Hornady dispenser, all so ole dead dismounter can eat it.

image_cropper_DF179D92-6528-4B70-9DB9-00D9124CCDF4-22345-0000029C200E35BA.JPGIMG_4736.JPG
 
It's here to stay, only because of factory support, wildcatting the Grendel is more expensive and a pain.


Hornady should have blown the case out more, straight walled ish, moved the shoulder forward two mm, and 40/42 degree.

I think people will end up wildcatting it.
That's basically what 6mmFatRat is as well as the older 6mmART40. My 6mmFatRat/22"/8 twist/95SMK is at 2924 fps. I went away from all the other heavier bullets because the rifle upset is lower using 95's and the slower velocity of the heavies pretty much cancels out gains in wind drift.

Just a test but I had 115gr DTACS going 2650 fps in a 26" ART40 and this was a very precise load. With the closed tip version the G1 BC was .59-ish. It was hard on brass so I didn't go farther with this load.

Both warm loads using H4895, the 95's less so, but if I used a temp sensitive ball powder at the same pressure I could have exceeded these numbers.

The 6mmART40 was so good I won a long range night match competing against bolt guns, mostly 6mm's and 6.5's. I was using 105Amax at the time at high 2800's.
 
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Man, I love my 6 arc. Put some parts together for mk12 feel with a cheap Shaw 18" barrel. It's a hammer.

I can't imagine with the 6 arc performance and such AR saturation in the market that it's going anywhere soon.
 

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