RE: 243 bullet
You can't beat the Sierras for accuracy in my opinion. But for a 243, I would be looking for something tougher, since the sierras tend to pancake out alot. I use a gameking for my 270win with good results at 130gr. The partition might be what you are looking for. I can't get the partitions to shoot as good as the sierras, but they shoot good enough for me.