This here is an AR500 steel target which is an inch thick, which is more than we can say for you. It comes with two holes in it.
It's in stock and ready to ship. Most 1" stuff has to be cut to spec, but we have these on hand. This is a great size for 200-300 yards for those learning how to run their 50. Going to be a bit small at 400 yards, but doable.
Rated for 50BMG at 100 yards. Remember M33 ball ammo is steel core, and not recommended. But I'm not your mother.
Good luck have fun don't die