10.5 Inch 300 Blackout from 300 to 500 yards

I did this video to prove a point after two people at the range told me that the 300 blackout is not accurate beyond 200 yards. This is false. I was so frustrated with this ridiculous internet notion I decided to take a 10.5 in to 500 without chronoing or doing adjustments. Also- before you talk about ft per lbs or "velocity" whatever the 5.56 round is doing, 300 blackout is doing double at the same range. The 400 yard target makes a whack sound due to the tiny plate. The 300 yard is a 12x10 and the 400 is a 5x5. The 500 yard is a 12x10.