Re: Deer hunting with AR platform
Biggest factors I see here are bullet weight, and propper bullet construction for the game intended + shot placement.
I killed two deer with a 24in barreled 6.8SPC with 110gr TSX Barnes. Don't know how fast it's going, but a little faster than 16in barrel.
Both deer, one MT mulie doe, and one small whitetail. Didn't use the rangefinder, but used 200yd dope, DRTx2. Both passthrough shots. The mulie boiler room, I try not to shoot the shoulders (makes good hamberger and sausage). The whitie through the neck plenty of dammage.
If you look up the ballistics on SSA (silver state arsenal), 115gr 6.8SPC has a nearly identical tragectory and FTLBS as that of a 147gr 7.62x51(308 Win).
And for the .223, I'd say bullet selection, nothing less than 55gr, and bonded, core lock, or Barnes style killing bullets.
I looked a lot too, I think the 6.5 Gren is slightly more accurate, over the 6.8SPC. The ftlbs numbers were a little better with the 6.8SPC.
As far as saving pelts, Barnes has solid bronze projectiles, just for that purpose.
My next Upper I think is going to be in .458 SOCOM, looks like a moose stopper!
There are only two seasons: Hunting season, and Getting Ready for Hunting season. -DAD