50 cal
I have been loading for my fifty for some time now. There are numerous variables. How many grains of powder,head space, bullet seat depth and so on. Is your gun custom or off the shelf.A custom rig will always be more accurate. Military guns are made to be reliable, customs are made for accuracy.If you tune your ammo and find the sweet spot, cross your fingers and have perfect conditions,you can hit very small things at a great distance. The best I have done is two shots in a three foot circle at 2500 meters. The worst I don't talk about. Rick at Alberta Tactical is the best resource for 50cal info and stuff.