Monster 6.5 Grendel 16 inch, 1:7.5 twist barrel review.

[A5BLASTER]

Nice to see another 1:7.5 16" option.

Since you asked about ABLR loadings, my current 129gr ABLR load for my 16" AA upper is 30gr of CFE223 at 1.648 BTO. I don't know the exact COAL but it fits in an E-lander Grendel mag. CCI 450 primers in Hornady brass. Leaving the barrel at 2365 fps, SD in the mid teens. The best I could get out of this combo is about 1" to 1.25" groups at 100 yards, which is perfectly fine for me since I consider this a hunting load.

After I burn through these though I'd like to try using AR Comp instead, the CFE burns dirtier than I like in the rifle. I also expect the velocity to drop a bit if fired in colder weather, since CFE223 is a bit temp sensitive.

You will lose alot of speed going to ar-comp with that bullet. I tryed it and it just couldn't get it going, h4895 works great with the 129 ablr if you have are can find some.

I had to use the cpd mags to get enough load length to get them sub-moa. With my six8 pmag setup my 2.295 coal length is easy because it allows just over 2.300 for load length. And a max coal on 5 rounds of 2.335 if I run them in my windowed six8 pmag.