No accuracy testing yet, that might happen next weekend, but I have done some velocity testing. I was able to test my 3 Grendel/Variants. My16 inch is discussed above. My 20” has a cut rifled Satern barrel seen in the “masterpiece”thread, and my 28” is one of the few 28” Grendels out there, with a cut rifled Satern barrel on a complete AA billet set.
I started with Hornady factory ammo. It fits and extracts from all three chambers without difficulty, as do all the other rounds tested.
Chronometer is a Competitive Edge Dynamics M2 set at 15 feet from the muzzle, with the latest version of software. Velocities are NOT muzzle velocities, but actual velocities at 15 feet. All velocities are listed in ascending order, not in the actual order they were recorded. There were no back to back duplicate velocities. There were a total of 8 error messages during the testing. The wind was blowing at 8-15MPH and this affected the screens at times, so I believe most of the errors were secondary to that issue. When an error occurred, the following shot was recorded. Factory velocities are from from the same box of ammunition for each rifle. Hand load velocities are from the same batch of handloads, using the same lot of powder and primers. Primers in hand loads are CCI 450 Small Rifle Magnum. Weather was 40-45 degrees, mostly sunny. Humidity of 60%. Altitude 1275 feet. Winds of 8-15 MPH.
Hornady Factory Amax
28”-2654, 2660, 2664, 2666, 2688. ES 34FPS AVG Vel 2666
20”-2458, 2459, 2461, 2470, 2480. ES 32FPS AVG Vel 2466
16”-2433, 2440, 2444, 2458, 2469. ES 36FPS AVG Vel 2448
Alexander Arms 123 Lapua Scenar
28”-2632, 2646, 2664, 2678, 2679. ES 47 AVG Vel 2660
20”-2509, 2514, 2517, 2518, 2531. ES 22 AVG Vel 2518
16”-2384, 2386, 2387, 2388, 2393. ES 9 AVG Vel 2388 Factory ammo with an ES of 9 for 5 shots!
THE FOLLOWING ARE HAND LOADS CAREFULLY DEVELOPED IN MY RIFLES. UNDER NO CIRCUMSTANCES SHOULD YOU START AT THESE LOADS!!!! THESE ARE NOT STARTING LOADS!!!!
This is the most accurate 100-500 yard load in my 28” rifle.
107 Sierra 28.5 grains XBR 8208 2.26 COAL
28”- 2692, 2702, 2714, 2716, 2724. ES 32 AVG Vel 2710
20”- 2608, 2633, 2642, 2645, 2652. ES 44 AVG Vel 2636
16”- 2482, 2482, 2490, 2513, 2530. ES 48 AVG Vel 2499
100 Berger 29.5grains XTerminator 2.26 COAL
28”- 2848, 2850, 2852, 2856, 2866. ES 18 AVG Vel 2854
20”- 2769, 2782, 2785, 2797, 2797. ES 28 AVG Vel 2786
16”- 2635, 2641, 2646, 2647, 2659. ES 24 AVG Vel 2646
I started with Hornady factory ammo. It fits and extracts from all three chambers without difficulty, as do all the other rounds tested.
Chronometer is a Competitive Edge Dynamics M2 set at 15 feet from the muzzle, with the latest version of software. Velocities are NOT muzzle velocities, but actual velocities at 15 feet. All velocities are listed in ascending order, not in the actual order they were recorded. There were no back to back duplicate velocities. There were a total of 8 error messages during the testing. The wind was blowing at 8-15MPH and this affected the screens at times, so I believe most of the errors were secondary to that issue. When an error occurred, the following shot was recorded. Factory velocities are from from the same box of ammunition for each rifle. Hand load velocities are from the same batch of handloads, using the same lot of powder and primers. Primers in hand loads are CCI 450 Small Rifle Magnum. Weather was 40-45 degrees, mostly sunny. Humidity of 60%. Altitude 1275 feet. Winds of 8-15 MPH.
Hornady Factory Amax
28”-2654, 2660, 2664, 2666, 2688. ES 34FPS AVG Vel 2666
20”-2458, 2459, 2461, 2470, 2480. ES 32FPS AVG Vel 2466
16”-2433, 2440, 2444, 2458, 2469. ES 36FPS AVG Vel 2448
Alexander Arms 123 Lapua Scenar
28”-2632, 2646, 2664, 2678, 2679. ES 47 AVG Vel 2660
20”-2509, 2514, 2517, 2518, 2531. ES 22 AVG Vel 2518
16”-2384, 2386, 2387, 2388, 2393. ES 9 AVG Vel 2388 Factory ammo with an ES of 9 for 5 shots!
THE FOLLOWING ARE HAND LOADS CAREFULLY DEVELOPED IN MY RIFLES. UNDER NO CIRCUMSTANCES SHOULD YOU START AT THESE LOADS!!!! THESE ARE NOT STARTING LOADS!!!!
This is the most accurate 100-500 yard load in my 28” rifle.
107 Sierra 28.5 grains XBR 8208 2.26 COAL
28”- 2692, 2702, 2714, 2716, 2724. ES 32 AVG Vel 2710
20”- 2608, 2633, 2642, 2645, 2652. ES 44 AVG Vel 2636
16”- 2482, 2482, 2490, 2513, 2530. ES 48 AVG Vel 2499
100 Berger 29.5grains XTerminator 2.26 COAL
28”- 2848, 2850, 2852, 2856, 2866. ES 18 AVG Vel 2854
20”- 2769, 2782, 2785, 2797, 2797. ES 28 AVG Vel 2786
16”- 2635, 2641, 2646, 2647, 2659. ES 24 AVG Vel 2646
You seek escape from pain. We seek the achievement of happiness. You exist for the sake of avoiding punishment. We exist for the sake of earning rewards. Threats will not make us function; fear is not our incentive. It is not death that we wish to avoid, but life that we wish to live. - John Galt