Levan9X19
Member
Ok I would never ever believe in this if someone would told me but I have seen this with my own eyes and I still wonder what can cause such a huge difference in accuracy between two more or less similar weapons using same ammo.
We had two Ar15's, one was built by owner with 16.5 barrel made by High Standard, chrome moly, 1;9 twist rate, , second rifle Mossberg MMR, slightly longer 20" barrel, chrome moly, same twist rate and brand new.
we mostly use green tip ammo, and although it is not very accurate it is very reliable and you can shoot a lot because its cheap here.
With built carbine using green tip ammo we achieved routinely 2 - 1.5 MOA so taking into account Mossberg's longer barrel, free floated handguard and superior optics (4-16x Monarch versus 4x Bushnell AR Optics) we where expecting better accuracy.... but from 100 yards rifle shot groups which barely fit in a A4 paper! Through 16x optic you see crystal clear image of target and the holes from hits, you brake the shot.... and see nothing, than you notice a hole somewhere in very corner of the scope far away from the POA and you are like, damn this was a perfect shot, how it could happen??? We used bipod, than rest, nothing. Group where extraordinary wide. The owner was desperate. AR-s are hard to find here, and are sold for premium price (MMR's price was 1800 USD) so imagine his frustration!
I would never ever suggest that ammo can make such a huge difference on such a short range so I checked the mount, the scope, the barrel, the handguard, everything was looking ok, no wiggle, no dents, no nothing. So I suggested to check the accuracy with match ammo. We than carefully handloaded ammo using Lake City brass and primers and 69 grain Sierra Match King HPBT bullets. Results where very good. Groups where around 1 MOA. Ok, fine. Problem solved, rifle owner smiles again. But we are scratching our heads. How can 3.5 inch difference in length cause such a huge difference? On such a short range? never ever I have witnessed something like this.
Than we shot groups with handloaded ammo from my personal Ar15 with the same High Standard barrel. The groups where between 30mm to 17mm. No surprises. In my carbine Green Tips grouped averagely at 45mm
How come you can get so much difference is beyond me, in ten years of constant shooting for the first time I have witnessed such a dramatic difference in results. Any input from fellow rifle shooters will be appreciated
PS
The ability of my garage built AR15, assembled with parts from dozen of manufacturers, with non free-floated 16.5 inch barrel, with self made trigger job on GI trigger, with modest 4x optics to shoot around 1MOA with quality ammo (after 2500 rounds fired down range) speaks itself for the inherent accuracy of this system. My respect to Eugene Stoner
We had two Ar15's, one was built by owner with 16.5 barrel made by High Standard, chrome moly, 1;9 twist rate, , second rifle Mossberg MMR, slightly longer 20" barrel, chrome moly, same twist rate and brand new.
we mostly use green tip ammo, and although it is not very accurate it is very reliable and you can shoot a lot because its cheap here.
With built carbine using green tip ammo we achieved routinely 2 - 1.5 MOA so taking into account Mossberg's longer barrel, free floated handguard and superior optics (4-16x Monarch versus 4x Bushnell AR Optics) we where expecting better accuracy.... but from 100 yards rifle shot groups which barely fit in a A4 paper! Through 16x optic you see crystal clear image of target and the holes from hits, you brake the shot.... and see nothing, than you notice a hole somewhere in very corner of the scope far away from the POA and you are like, damn this was a perfect shot, how it could happen??? We used bipod, than rest, nothing. Group where extraordinary wide. The owner was desperate. AR-s are hard to find here, and are sold for premium price (MMR's price was 1800 USD) so imagine his frustration!
I would never ever suggest that ammo can make such a huge difference on such a short range so I checked the mount, the scope, the barrel, the handguard, everything was looking ok, no wiggle, no dents, no nothing. So I suggested to check the accuracy with match ammo. We than carefully handloaded ammo using Lake City brass and primers and 69 grain Sierra Match King HPBT bullets. Results where very good. Groups where around 1 MOA. Ok, fine. Problem solved, rifle owner smiles again. But we are scratching our heads. How can 3.5 inch difference in length cause such a huge difference? On such a short range? never ever I have witnessed something like this.
Than we shot groups with handloaded ammo from my personal Ar15 with the same High Standard barrel. The groups where between 30mm to 17mm. No surprises. In my carbine Green Tips grouped averagely at 45mm
How come you can get so much difference is beyond me, in ten years of constant shooting for the first time I have witnessed such a dramatic difference in results. Any input from fellow rifle shooters will be appreciated
PS
The ability of my garage built AR15, assembled with parts from dozen of manufacturers, with non free-floated 16.5 inch barrel, with self made trigger job on GI trigger, with modest 4x optics to shoot around 1MOA with quality ammo (after 2500 rounds fired down range) speaks itself for the inherent accuracy of this system. My respect to Eugene Stoner