Quote History Quoted:
The three builds are-
1-20" Larue Stealth
1-18" Lothar Walther
1-18" Green Mountain
Intended purpose for these are target/varmint shooting out to 600-800 yards.
The Green Mountain has been out a few times and easily hits a 12" steel plate at 720 yards with 55 grain cheap Federal AE 223 ammo. Witnessed by a friend who I later let his 15 year old son shoot the rifle. He hit the plate 49 out of 55 shots as we spotted and corrected his aim for wind drift.
I am sure the 69 grain will be better suited for longer range even with less initial velocity yet having better accuracy.
Wish Molon had a review on this ammo. I see he does for the 55 grain ADI but not this 69 gr.
No way I know other than to shoot it but just wanted others experience with it is all.
I know many would say shoot 77 grain but I like how 69 grain shoots closer to the same point of aim as my 55 grain ammo varieties I have stocked up for general shooting.
With the builds above I am expecting 1 MOA or less without having to make up hand loads. Do enough of that with my 300 Winchester Magnum and others.
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Sorry for the $hitshow in your thread OP. Sounds like a solid line of thinking to use the 69gr pills for those builds. I see what you're trying to do with a round with a closer POI to your other ammo if that's what you get out of the 69gr stuff.
The only caveat I have now is that you may eventually want to try some 77gr loads, not because they are heavier but because the BC is higher, meaning better performance at the extreme (for .223/5.56) ranges you want to shoot.
In case you don't know, here are some BC numbers for popular Sierra bullets (taken from sierra's
website):
69gr Matchking
.301 @ 2800 fps and above
.305 between 2800 and 2200 fps
.317 @ 2200 fps and below
69gr Tipped Matchking
.375 @ 2700 fps and above
.365 between 2700 & 1950 fps
.335 between 1950 & 1700 fps
.305 @ 1700 fps and below
77gr Matchking
.372 @ 3000 fps and above
.362 between 2500 and 3000 fps
.362 between 1700 and 2500 fps
.343 @ 1700 fps and below
77gr Tipped Matchking
.420 @ 2400 fps and above
.415 between 2400 and 2000 fps
.395 between 2000 and 1750 fps
.380 @ 1750 fps and below