JNAP94 ......got it. And I'll leave everything else for whatever debate occurs after testing.
A redneck's famous last words...."Hey everybody, watch this!"
Me personally, none. The guys I used to work for. Plenty. Mk262 and Mk318 did just fine and plenty of regular line guys popped bad guys with good old fashioned m855 up to 5/600 meters and made kill shots. The intermediate range hits (>300 <800 are considered "meh" in a lot of circles in Afghan because it happens often enough.
The Mk12 program came into being for a reason and the shift in the USMC to using the M27 in this role simply validates the utility of the program and its effectiveness.
But just for the sake of debating with you, and your almighty skill set, I'll let you in on this one. It's declassified, and if you need pics, I've got em. Hell...the body's are still frozen.
Coyotes since Jan 1:
1 at 205 yds......yesterday
1 at 305 yds......Jan 1
1 at 408 yds......Jan 2
And yes....you guessed it. 7.62
Don't get me wrong....I love me some HK416.....but Coyotes are more illusive and harder to find than a 12 point buck. Since you might not understand.....you can't get within 200 yds of a Coyote, because their ability to pick your scent is like 10,000 times more than a human's. Thus the reason I switch to 7.62 over 5.56.
Me and my buddies used a few AR series rifles and a couple ran .223 bolt guns. One a 22-250, and one guy even trucked around a 30-06, but he was no more effective or ineffective than anybody else. One even managed to do ok with a mini-14 (scoped).
Up in the parts where I live now we just wait for someone to complain about the 'yotes going after their chickens or pets, set up on a weekend evening and let them come to us. Make the vast majority of shots sub 75 to 50 meters (RDS's). Not sure why you're having such an issue taking your 'yotes or getting them close. You must be doing something wrong.
That being said, I thought we were talking about real world military applications, not varmint hunting. Never the twain shall meet.
My doubt grows.
Capped one in the dome a few years back with a 22 Hornet at about 80-85y to see if I could. We use .338's and .300's now...far less subtle.