I don’t raise the standard it’s just math ,
By your measurements , 3.008 (raw agg ) 1.54 (.308 x5 )= 1.468/5 = .2936/1.09= .2693 , (unless my math is wrong, in which case I apologize) now add in the fact that a .308 Bullet makes a smaller than .308 hole depending on what paper you shoot it through usually .015-.030 smaller and you can add another .030-.060 on your agg , .250 aggs don’t usually have any groups with paper between the Bullet holes.
Does any of this matter to the average (normal ) shooter? probably not , however, though it is a great shooting rifle and I’m sure it will do all you need it to do , it is not a .250 out of the box rifle ,
As you said “The facts are the facts “
In my mind a .250 moa rifle is a rifle that will do it more often than not “on demand”
Still a great shooter though
To be honest, I don't understand your caculate method... have no idea what 'agg' means, tried to google it, but no lucky. sorry, I'm just a noob in this sport, so many terms I just have no idea. So, in your caculation, it's a .269 or .27 moa avg rifle, am I right? You're a pro, so whatever you got, there is no argue for that. I agree it and trust it

. Having said that, from an ameture shooter perspective, .27 moa rifle is a .25 moa rifle. I know, technically, it's not, but that's why we're ameture shooters

. We round it down, and never round it up, no never.

(BTW, I'm in the process of out of this hobby, all my rifles will be put on sell. so honestly I don't care how it shoots that much.)
Have/had five high-end factory rifles, did load develoopment for two of them. I can feel that the other one shoots better than this one, if you jam the bullets. Unfortunately, it's ruined by a local gunsmith, who has very good reputation and many forum members re command them. I regret it a lot. Anyway, my point is, if I tried two high-end rifles, and they both shoot at this level or better, am I just that lucky or this is the average performance for high-end factory rifles. I just don't know.
thank you for spending your valuable time to reply me. appreciate it.