Seeing your front sight post won't be an issue if you are above 3x or 4x. Don't worry about it.
I agree with The Kid, a 77 tmk is the best I've used in a 223. If someone told me to shoot everything I hunt with a 55grain hornady SP I wouldn't feel too handicapped. It's a great bullet.
I feel like a lot of people go the wrong way with the 223 on big game. They want to shoot really tough bullets to insure penetration
That comes at the cost of way less tissue damage though. If you want to not worry about some bone and quartering shots then the gold dots or fusions are a nice compromise
