I don't know much about guns and ammo but wonder about the feral pig situation in the southern states. Some people trap them but there're a lot of videos of them being shot.Have you heard of the war Aussies had on birds.....and lost? lol Took too many bullets and it wasn't cost effective.
Helicopter hunting is a thrill sport with machine guns or at least rapid fire. Obviously a lot of bullets miss and are left in the soil.
Are the bullets lead or other metal and will they leach into the soil? Will the crops pick up the lead or whatever the bullets are made of and taint the crops?