How does this work?

[J.G.W]

Recently spotted this on Instagram. This guy is claiming a 0.1MOA group with his .223, is that even possible? I would've thought that a perfect one shot group with a .223 could at best be 0.223MOA. Am I wrong or is this guy speaking bull s..t?

 

[jimbires]

you subtract one bullet diameter for group size .

 

[Creedmoor shooter]

Measure outside to outside and subtract the bullet diameter. A perfect group would b .000 moa. My tightest 3 shot group ever was with my 6.5 measuring .076 moa. .340 OTO - .264= .076 moa.

 

[J.G.W]

Understood. Thanks guys