I've killed a number of deer with a 30-30 , the majority of them died within 10-15 yards of where they were shot...BUT.. I shot a nice point buck thru the lungs and a second shot in the neck [ missed the spine] and he ran a full 200 yards in brush, blowing blood hard out both sides...... point is, I think it is sometimes more the deer than the caliber. I don't believe that deer had a quart of blood left in him, he just didn't know it............
I was told when I was a kid that the 30-30 wasn't a 'killer', but I've come to think otherwise. Use it within its limits and it will do just fine.