Re: Best caliber for deer out to 800 yards
I agree with the 6.5 Creedmore it's a good choice. That said I also like and shoot a 243AI, 6.5 Grendel AR, 7-08, 308, 280, 30-06 and 300Win Mag. I've shoot deer with them all. The 300WM smokes them. I've taken a couple with the 243AI and it's capable of 800 yards if the conditions are common. The 7-08 has taken elk and deer to 650 yds with one shot kills. I'm currently varmint hunting with the 6.5 Grendel and have killed coyotes and jackrabbits to 600 yards.
Research and than buy what YOU feel fits your needs.