Best caliber for an AR build for hunting/long range?

[USMCmatt]

Might just make a fun AR for mid-range and get a specific long-range purpose rifle based on all the info here. I would be looking for 800 yds plus.

[jimmykan]

Might just make a fun AR for mid-range and get a specific long-range purpose rifle based on all the info here. I would be looking for 800 yds plus.

Affordable mid-range = 223 Wylde shooting 75-77 grain bullets from a magazine or 80 grain bullets seated long (~2.5" COL) and single-loaded into the chamber. These are the NRA Highpower AR-15 service rifle shooters' go-to loads from the 600 yard line.

Service rifle division is limited to US service rifles and service cartridges, so it's basically a choice of 223 or 308 or 30-06. From what I understand, these 223 75 - 80 grain loads equal or surpass the 175 grain load that the M1A/M14 service rifle shooters use.

I'm not sure about 800 yards, but I do think some people shoot FT/R rifles in 223 using 90 grain bullets. Out to 1000 yards even. These are bolt action rifles, not AR-15s though.

[Blade Gunner]

6.5 Creedmore. (AR10/SR25) frame. They are heavy though. Springfield M1A recently released in 6.5 Creedmore if you want semi auto without all the AW BS laws. Ammo price have dropped a bunch. Used to be $1.00 a pull, now .60.


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[Paparock]

Another 6.5 Creedmoor

[Echidin]

For AR-10, another vote for 6.5 Creedmoor.

For AR-15, 6.5 G. The .224V looks very promising, I’m just not sure about ammo availability at this point.

[fresnohunter]

243 WSSM might be worth looking into.