Doing my first build. I am putting together a 243. I have most of my parts and just can't decide on barrel twist. I am not set up to reload so I need to be able to shoot factory ammo. I want a rifle that can shoot 600-800 yard paper on the range as well as shoot deer. I was thinking 1:8 for a long time but I don't know if thats too fast for most factory ammo. Is it better to have too much twist or too little twist?