If you just want a 6.5 Grendal then build one, But I have worn out 3 .223s shooting pigs, it kills them dead,no matter what size they are, and I don't use any special hand rolled super bullet, powder, Zombie, load, just factory 55 gr btsp, and I have killed pigs with every thing from a .22lr up a 404 Jeffery, it ain't what you shoot them it's where you shoot them,I carry a .223 ar-15 in my jeep and kill pigs almost every day year around . rio7