10-18-2017, 02:13 AM
Figured I've lurked on here long enough and gotten enough good info to pass along what I've found with my Grendel so far. Put together this Grendel about almost 2 years ago now I suppose and I've put roughly 1500 rounds through it I think. I did break the first bolt head I had on the rifle and I think that was my fault. I was running on high pressures with a supressor and honestly the gun was so dirty I was surprised it was still functioning. I keep her clean and oiled up now and haven't had any more hiccups. I use the ASC mags and they work well for me.
Build Info:
Aero Blem Upper, Anderson Lower, Satern 18" barrel and (now) Maxim Bolt, Superlative arms adjustable gas block, APF NB Bolt Carrier, CMC flat 3.5lb trigger, Silencerco Omega mounted on ASR brake, Magpul MOE Rifle stock (Being replaced with Aero mil spec buffer tube, Magpul MOE SLS stock), JP flat ground buffer spring, standard rifle buffer. Right now she's wearing a Gen1 Razor 5-20 in a ADM 20moa scope mount. I think that's it... Anyways. Load data below.
Tried a handful of different weights and powders and got decent results but nothing earth shattering like I've read the Grendel can do until I hit the 123 gr stuff. Here's the load that's worked the best for me out to 600 yards. It has varied on the low side of an average of 2522 fps to a higher average of 2538 fps throughout the year. All with low SD #'s. From the 18" barrel I'll take it.
27.6 gr AR Comp / Hornady Brass / CCI 450 Primers
Hornady 123ELD-M Bullets / COL 2.26" / Avg 5 shot group size 0.23 MOA
Chrono data from 5 shot groups-
(1) 2521 (2) 2520 (3) 2519 (4) 2528 (5) 2524 (Max) 2528 (Min) 2519 (Avg) 2522 (SD) 3.6
Build Info:
Aero Blem Upper, Anderson Lower, Satern 18" barrel and (now) Maxim Bolt, Superlative arms adjustable gas block, APF NB Bolt Carrier, CMC flat 3.5lb trigger, Silencerco Omega mounted on ASR brake, Magpul MOE Rifle stock (Being replaced with Aero mil spec buffer tube, Magpul MOE SLS stock), JP flat ground buffer spring, standard rifle buffer. Right now she's wearing a Gen1 Razor 5-20 in a ADM 20moa scope mount. I think that's it... Anyways. Load data below.
Tried a handful of different weights and powders and got decent results but nothing earth shattering like I've read the Grendel can do until I hit the 123 gr stuff. Here's the load that's worked the best for me out to 600 yards. It has varied on the low side of an average of 2522 fps to a higher average of 2538 fps throughout the year. All with low SD #'s. From the 18" barrel I'll take it.
27.6 gr AR Comp / Hornady Brass / CCI 450 Primers
Hornady 123ELD-M Bullets / COL 2.26" / Avg 5 shot group size 0.23 MOA
Chrono data from 5 shot groups-
(1) 2521 (2) 2520 (3) 2519 (4) 2528 (5) 2524 (Max) 2528 (Min) 2519 (Avg) 2522 (SD) 3.6

