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The Basics, Starting Out
Accuracy Issues with AR50...Need Some Help
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<blockquote data-quote="Raptor Shooter" data-source="post: 808601" data-attributes="member: 59368"><p>Guys,</p><p></p><p>Took my AR50 out today for the first time. Unfortunately I'm having issue getting on paper (I'm talking can't hit a 4' x 4' plywood target at 200 yards....embarrassing but confusing enough that I'm looking for help ). Just want to get some thoughts on what I may be overlooking. Note that at the same distance on the same range I can shoot sub MOA with my Bushmaster AR15.</p><p></p><p>Rifle - Left Hand AR50</p><p>Scope - Nightforce NXS 5.5 x 22 x 56 w/ NPR-1 reticle</p><p>Mount / Rings - Nightforce Unimoumt </p><p>Rounds - 750 grain Hornady AMAX factory loads</p><p>Distance - 200 yards</p><p>Range Slope ~ 6 degrees down hill measure with Nightforce ADI</p><p>Wind - Minimal....less than 5 mph crosswind</p><p></p><p>General Comments</p><p>Rifle was new in box. Swabbed barrel and chamber and lightly oiled both prior to shooting.</p><p>Bench is a custom 4' x 6' bench I built specifically to handle this gun.</p><p>Rest is a Rock River Jr under the forearm and bean bag in back. No movement even when not shouldering rifle.</p><p>When mounting the scope I used bubble levels immediately in front of scope base to level rifle longitudinally and transversely. I then mounted scope and leveled with bubble level on elevation adjustment knob initially followed by fine tuning using a plum bob at ~ 25 yards. After verifying all levels I torqued the Unimout and ring screws per Nightforce. </p><p>Prior to shooting I bore sighted with laser at 50 yards (max distance I could see laser) to 2 inches high (~theoretical bullet rise I per Hornady). I then backed up and fired x2 shots shots at 200 yards (both clean misses). At that point it was dark enough to see bore sight laser at 200. I had to adjust two clicks down and 1 left (theoretical 0" bullet drop / rise per Hornady....ie "dead on"). I then fired two more shots and neither cut the plywood. </p><p>I figured I was flinching as I have never had trouble sighting in. I've got the same exact scope except its 3.5 x 15 x 50 on my AR15 and I can shoot sub MOA from the same exact spot. At that point I had my buddy film me on the 3rd and 4th shots and on both I appear stock still. For y'all's info the recoil is comparable to my 30-06 but the shock wave is quite significant which I anticipated. In other words maybe I got the usual "wiggles" but nothing significant.</p><p>Thought on the issues.....?</p><p>The only thing I can see is possibly parallax issues. I'm no expert on correctly setting this but I followed Nightforce directions and I can't see it effecting the bullet flight that much. Y'all's thoughts?</p><p>Anything else I might have overlooked? Is the 6 degree down slope significant enough to have this effect. Haven't worked ballistics yet but I can't see it being the culprit.</p><p>Thanks,</p><p>Josh</p></blockquote><p></p>
[QUOTE="Raptor Shooter, post: 808601, member: 59368"] Guys, Took my AR50 out today for the first time. Unfortunately I'm having issue getting on paper (I'm talking can't hit a 4' x 4' plywood target at 200 yards....embarrassing but confusing enough that I'm looking for help ). Just want to get some thoughts on what I may be overlooking. Note that at the same distance on the same range I can shoot sub MOA with my Bushmaster AR15. Rifle - Left Hand AR50 Scope - Nightforce NXS 5.5 x 22 x 56 w/ NPR-1 reticle Mount / Rings - Nightforce Unimoumt Rounds - 750 grain Hornady AMAX factory loads Distance - 200 yards Range Slope ~ 6 degrees down hill measure with Nightforce ADI Wind - Minimal....less than 5 mph crosswind General Comments Rifle was new in box. Swabbed barrel and chamber and lightly oiled both prior to shooting. Bench is a custom 4' x 6' bench I built specifically to handle this gun. Rest is a Rock River Jr under the forearm and bean bag in back. No movement even when not shouldering rifle. When mounting the scope I used bubble levels immediately in front of scope base to level rifle longitudinally and transversely. I then mounted scope and leveled with bubble level on elevation adjustment knob initially followed by fine tuning using a plum bob at ~ 25 yards. After verifying all levels I torqued the Unimout and ring screws per Nightforce. Prior to shooting I bore sighted with laser at 50 yards (max distance I could see laser) to 2 inches high (~theoretical bullet rise I per Hornady). I then backed up and fired x2 shots shots at 200 yards (both clean misses). At that point it was dark enough to see bore sight laser at 200. I had to adjust two clicks down and 1 left (theoretical 0" bullet drop / rise per Hornady....ie "dead on"). I then fired two more shots and neither cut the plywood. I figured I was flinching as I have never had trouble sighting in. I've got the same exact scope except its 3.5 x 15 x 50 on my AR15 and I can shoot sub MOA from the same exact spot. At that point I had my buddy film me on the 3rd and 4th shots and on both I appear stock still. For y'all's info the recoil is comparable to my 30-06 but the shock wave is quite significant which I anticipated. In other words maybe I got the usual "wiggles" but nothing significant. Thought on the issues.....? The only thing I can see is possibly parallax issues. I'm no expert on correctly setting this but I followed Nightforce directions and I can't see it effecting the bullet flight that much. Y'all's thoughts? Anything else I might have overlooked? Is the 6 degree down slope significant enough to have this effect. Haven't worked ballistics yet but I can't see it being the culprit. Thanks, Josh [/QUOTE]
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