I did iron sight and LPVO elevation tests. I did not shoot for group size there was allot of work and the rifle had previously and temporarily been mounted with a varmint scope to justify and further effort, some of that effort has been made.
RECAP: Aero Precision 16" stainless M4E1, test rounds Hornady factory 105 Black, clocked average 2550 FPS.
DISCLAIMER: I build rifles for a task and as most people are, I'm prejudiced by my past experiences and will do my best to compensate, I do fairly well at mitigating my prejudices, I love red heads but have been married to a brunette for over 50 years. With this said I have felt and have demonstrated much to the chagrin of my son and several Gunnery Sergent's since 1973 that within 200 yards I shoot AR's better with iron sights, at 300 yards and farther out the scopes get the nod. But I do make a high percentage of hits with irons at 600 yards.
The configuration of the sights is for my purposes and the results will be on going. From my experiences and my preferences, an AR15 is a working rifle, I am uncomfortable with it on the bench, because in my experience it was not built to be used on a bench. My rifle is sighted with iron sights and a Sig Sauer 1 x 10 x 28 LPVO. I will not review the scope here but will give a rough opinion, I will post a screen capture of the type of target used for the test.
The test was to shoot 25, 50, 100, 200, 300, 400, 500 and 600 yards with both sight types zeroed at 300 yards and map the real-world elevation at the aforementioned ranges, then using the online Hornady ballistic calculator compare the real-world results with the calculator.
PREJUDICE DISCLAMER: Anyone who complains that over this many sample ranges that a 1" discrepancy at any rage 200 yards or farther is a big deal should get a helmet. An example is the 200-yard range, 300 yard zero, 200-yard impact with scope 6.5" high, (calculator said 5.9") with iron sights the test at 200 yards was 6.6" the calculator said 6.2". Who cares, aiming inaccuracies, maybe! Do ya think! The important part is in close, the scope test was -1" at 25 yards and the iron sight was +.8" at 25 yards exactly what the calculator said. So, in close and scoped, hold low, iron sights in close point and fire.
The results for iron sights is a trajectory with a 300 yard zero from -1.5" to a measured peak of 6.7" high at 200 yards, the calculator say 6.7" at 175 yards. The measured drop at 600 yards was 75.8", the calculator said 72.3", you can imagine it took 6 fired 5 shot groups to establish my insanity! The errors from measure to calculator were larger as the range increased.
All measured iron sights sight height 1.5", 25 (+.8"), 50 (+2.6"), 100 (+5.5") 200 (+6.6"), 300 (0"), 400 (-14.5
500 (-41") 600 (-75.8").
All measured LPVO sight height 3.5", 25 (-1"), 50 (+1.1"), 100 (+4.5"), 200 (+6.5"), 300 (0), 400 (-14.6") 500 (-39"), 600 (-74.4"). The 600-yard test was accomplished in 2 rounds of 5 shots, quite an improvement. The calculator posted the 600-yard scoped trajectory at -73.8" only about 1/2" from the measured result, interesting.
The worst error was at 600 yards iron sight, over 3.5", well with aiming error with iron sights. The LPVO errors compared to the calculator were less, in my opinion still quite possibly due to bad shooting on my part.
The scoped trajectory was highest at 200 yards 6." and the calculator was withing .6.2" at 175 yards, the 600-yard drop was near dead on.
The scope in my opinion should be used on different target and treated more like an iron sight due to the reticle which is a BDC.
More to come with significant scope testing with new targets.
RECAP: Aero Precision 16" stainless M4E1, test rounds Hornady factory 105 Black, clocked average 2550 FPS.
DISCLAIMER: I build rifles for a task and as most people are, I'm prejudiced by my past experiences and will do my best to compensate, I do fairly well at mitigating my prejudices, I love red heads but have been married to a brunette for over 50 years. With this said I have felt and have demonstrated much to the chagrin of my son and several Gunnery Sergent's since 1973 that within 200 yards I shoot AR's better with iron sights, at 300 yards and farther out the scopes get the nod. But I do make a high percentage of hits with irons at 600 yards.
The configuration of the sights is for my purposes and the results will be on going. From my experiences and my preferences, an AR15 is a working rifle, I am uncomfortable with it on the bench, because in my experience it was not built to be used on a bench. My rifle is sighted with iron sights and a Sig Sauer 1 x 10 x 28 LPVO. I will not review the scope here but will give a rough opinion, I will post a screen capture of the type of target used for the test.
The test was to shoot 25, 50, 100, 200, 300, 400, 500 and 600 yards with both sight types zeroed at 300 yards and map the real-world elevation at the aforementioned ranges, then using the online Hornady ballistic calculator compare the real-world results with the calculator.
PREJUDICE DISCLAMER: Anyone who complains that over this many sample ranges that a 1" discrepancy at any rage 200 yards or farther is a big deal should get a helmet. An example is the 200-yard range, 300 yard zero, 200-yard impact with scope 6.5" high, (calculator said 5.9") with iron sights the test at 200 yards was 6.6" the calculator said 6.2". Who cares, aiming inaccuracies, maybe! Do ya think! The important part is in close, the scope test was -1" at 25 yards and the iron sight was +.8" at 25 yards exactly what the calculator said. So, in close and scoped, hold low, iron sights in close point and fire.
The results for iron sights is a trajectory with a 300 yard zero from -1.5" to a measured peak of 6.7" high at 200 yards, the calculator say 6.7" at 175 yards. The measured drop at 600 yards was 75.8", the calculator said 72.3", you can imagine it took 6 fired 5 shot groups to establish my insanity! The errors from measure to calculator were larger as the range increased.
All measured iron sights sight height 1.5", 25 (+.8"), 50 (+2.6"), 100 (+5.5") 200 (+6.6"), 300 (0"), 400 (-14.5
500 (-41") 600 (-75.8").All measured LPVO sight height 3.5", 25 (-1"), 50 (+1.1"), 100 (+4.5"), 200 (+6.5"), 300 (0), 400 (-14.6") 500 (-39"), 600 (-74.4"). The 600-yard test was accomplished in 2 rounds of 5 shots, quite an improvement. The calculator posted the 600-yard scoped trajectory at -73.8" only about 1/2" from the measured result, interesting.
The worst error was at 600 yards iron sight, over 3.5", well with aiming error with iron sights. The LPVO errors compared to the calculator were less, in my opinion still quite possibly due to bad shooting on my part.
The scoped trajectory was highest at 200 yards 6." and the calculator was withing .6.2" at 175 yards, the 600-yard drop was near dead on.
The scope in my opinion should be used on different target and treated more like an iron sight due to the reticle which is a BDC.
More to come with significant scope testing with new targets.
