We shoot a lot of deer here. The 'minimum caliber' for one may be overkill or ineffective for another. It's often stated that the 'minimum' energy for 'big game' is 1000 foot pounds at the distance of the hit.
I often use a 10.5" AR ,223 'pistol' and it works fine--FOR ME. Probably not so fine for others. Several factors involved with such a choice such as weather conditions (snow/no snow), hunting location (heavy cover/wide open area), and even hunter's capabilities to follow up the shot.
I've seen hunters(?) shoot at deer and if the animal didn't fall dead on the spot, assume a miss and move on. When asked if they were going to check for blood, the 'dude' said "Ah, I probably missed, maybe I'll kill the next one". o_O
I often use a 10.5" AR ,223 'pistol' and it works fine--FOR ME. Probably not so fine for others. Several factors involved with such a choice such as weather conditions (snow/no snow), hunting location (heavy cover/wide open area), and even hunter's capabilities to follow up the shot.
I've seen hunters(?) shoot at deer and if the animal didn't fall dead on the spot, assume a miss and move on. When asked if they were going to check for blood, the 'dude' said "Ah, I probably missed, maybe I'll kill the next one". o_O