I take a different stance here. You want to kill them, or stop them for pictures? Ammo gets expensive fast if you do this much. After 20 kills you won't bother with pics any more. We want them dead but I don't care if they go off and die a slow painful death all alone in the world. I have used a variety pack of weapons. To sum it up go 308 if it's a one time hunt, limited numbers of pigs, +200 yards consistently, or you want to find every one you hit for pictures. Go 223 cheapest fmj that is 100% reliable, wolf gold works well if you want to kill but don't care when, always close range, hunting around livestock, are trying to be cost effective with your weapon and ammo. If consistently 3 or more pigs at a time use 223 heavy bullets, faster back on target. I go cheap and I hunt walking with NV solo and it's never been a problem. It seems like I average about 2 rounds an animal for each one I find and I find roughly 2/3. That's all sizes and ranges. Stick with 223 or 308 or you drop a lot of money fast for not a lot more. 308 m80 is cheaper than fancy heavy 223 bullets or odd calibers.