I've started weighing my surplus ammo to get a better idea of how different the weights are, because I weigh the entire bullet together I don't know what single thing makes one bullet heavier then the others. But it does allow me to group them with each other for a hope of better accuracy. I went out and shot a 3" group at 30 yards with some 253 Ove Gr bullets. Which I'm not going to lie that's the best group I've shot with the cheap surplus ammo. Considering I'm usually to broke to buy the good ammo (when you can find it) I'm hoping I have something here. Any thoughts?