Hornady 6mm ARC (.243) Released - fits AR-15 magazines

"The 6mm Advanced Rifle Cartridge (6 ARC) by Hornady is a new cartridge that can fire a sleek 6mm (.243) caliber projectile around 2,700 fps with minimal recoil and the 6mm ARC Cartridge is short enough to fit within the dimensions of a standard AR-15 magazine and it performs very well out of an AR-15 with an 18 inch barrel"
https://gununiversity.com/6mm-arc-review/

""So, effectively a modernized 6.5 Grendel?"

...
It even uses the same bolt and we used Alexander Arms 6.5 Grendel-marked magazines in our testing. Here you can see the larger 6mm ARC bolt-face ..."

One last note:

" If you already have a 6.5 Grendel or you want the most energy, then it's probably 6.5 Grendel for you. However, if you're looking at both to consider and you like the idea of low recoil and long range performance with more efficient bullets, you should get a 6mm ARC."

Compare this to the 6mm/223 - 6X45 ...

From: https://www.gunsandammo.com/editorial/retro-223-6mm-223-load-data-long-range-handgun/367647

 

#AR-15, #AR15, #AR-40, #AR40, #AR-45, #AR45, #AR-9, #AR9, #AR-16, #AR16, #M-16, #M16,