Here is the rifle set-up:
Here is the dilemma. I zeroed the Atibal at 25 meters just like an Aimpoint T-2, bench-rested on sandbags albeit canted 45-degrees, resulting in about a .75" group. I then shot free-standing at 25 meters canted at 45-degrees and noticed an eventual POI shift to the left of a few inches, still using Wolf steel-case.
Puzzled, I switched to Hornady Black and was rather shocked that POI using the same zero with 3 rounds was 5.5"L and 2.5"H in a very sloppy group, while bench-rested. I re-zeroed the Atibal with the remaining Hornady Black (about $6 later) and had a .5" group at 25 meters, still bench rested.
I also have a 6.5G SBR 11.5" Criterion with a Vortex Razor-E 1-6x. I consistently hit tight center-mass free-standing from 20-50 yards at 1x using Wolf steel case; any flyers are operator error.
My concern is if the Atibal is losing zero due to a defect. Or, is it possible for POI to shift that dramatically (5.5"L and 2.5"H) going from Wolf steel case to Hornady Black using the same zero, only at 25 meters?!
Cheers, Hans
- 16" Criterion 6.5 Grendel bored by Mark at PF
- Primary Optic: Sig Tango4 4-16x (stellar performer)
- Just added an Atibal MRD V2 4MOA RDS for CQB (similar to a Vortex Venom)
- The Atibal is solidly mounted on a Magpul 1:00 offset mount (no movement)
Here is the dilemma. I zeroed the Atibal at 25 meters just like an Aimpoint T-2, bench-rested on sandbags albeit canted 45-degrees, resulting in about a .75" group. I then shot free-standing at 25 meters canted at 45-degrees and noticed an eventual POI shift to the left of a few inches, still using Wolf steel-case.
Puzzled, I switched to Hornady Black and was rather shocked that POI using the same zero with 3 rounds was 5.5"L and 2.5"H in a very sloppy group, while bench-rested. I re-zeroed the Atibal with the remaining Hornady Black (about $6 later) and had a .5" group at 25 meters, still bench rested.
I also have a 6.5G SBR 11.5" Criterion with a Vortex Razor-E 1-6x. I consistently hit tight center-mass free-standing from 20-50 yards at 1x using Wolf steel case; any flyers are operator error.
My concern is if the Atibal is losing zero due to a defect. Or, is it possible for POI to shift that dramatically (5.5"L and 2.5"H) going from Wolf steel case to Hornady Black using the same zero, only at 25 meters?!
Cheers, Hans
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