You can re-use the pulled bullets, 7.62-308-3030 all use the same size diameter bullet.
Are you talking about powder from factory loaded winchester cartridge? If so I wouldn't try re-using the powder, I've pulled some Winchester Extreme and the powder inside was a blended powder some flake and some ball mixed.
It's a prioritized powder and there's really no data available for what or how it reacts in anything but the factory ammo,, with that bullet,, in that amount,, in that case. And Winchester ain't gonna tell us, if they did everybody would just load there own.
If it's from rounds that you have loaded then you know what the powder it is, where it came from and how much there is,, by all means go ahead and re-use your own powder.