I think it's important to remember...

by Sarge , Central Misery, Saturday, October 10, 2015, 10:50 (3272 days ago) @ MR
edited by Sarge, Saturday, October 10, 2015, 13:54

that these 'sight in at 25 yards' protocols were intended to establish battle zero with multiple rifles with sights, barrels and ammunition all manufactured to specific contract specifications. Even when it all works perfectly, you still get a rough zero that generally approximates a human torso; a far less perfect zero than most of us will settle for with a hunting rifle.

I've seen this tried with a myriad of personally owned AR's supplied by patrol officers and we invariably end up making adjustments to get them in the 10 ring of a B27 at 100 yards.

When zeroing my personal rifles, I staple a 7" paper bowl into the center of a B27 and use that to bore sight them at 50 yards. I am usually at least on the edge of it in the first few shots and have the rifle zeroed at 200 in 20-30 rounds of ammo. Often less.