if the 7.62x39 is lethal for good sized deer, then i expect the mini 30 is adequate for deer hunting.
i have been hiking and had large deer pop 20 yards in front of me...perhaps less.
i dont know what specific factors make a rifle less accurate than another...barrel hardenss, or rifling, or barrel length, overall balance??
is 16 or 18 inch barrel typically short for a hunting rifle?? if so then another option may be better.
i didn think the mini 30 was specifically desinged for deer hunting. killing or wounding farm predators or various duty operations such as prison guards of armed security where less than 100 yard shooting would likely be the scenario.