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Posted: 1/7/2008 3:41:34 PM EDT
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I'm Very new to the forum and VERY new to ARs, i just got a panther .223 for christmas and a used BSA red dot for my birthday. im sure the red dot isnt the best, but it was local and my dad said for the price it would do till i get something better. i have no documentation or anything, it just says "BSA red dot" on the side, and its 1x, i was trying to zero it in sunday and it accured to me.... how can you? I've zero'd in 3 rifle scopes and im pretty good at it... but the red dot moves when you move your head, so the position of the dot changes, thus in theory, sometimes it might seem like its off... and would i still need a front sight to put the dot above to line up my shot? im sure this was aksed before but i couldnt find a thread... any help is appreciated |
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thanks for the welcome, can you explain it any better? i was having a hell of a time sighting it... i would think it the gun is perfectly still, and i keep my head in the same spt, the dot is say on bullseye, bullet hits bellseye, now i keep the gun still, but move my eye a half inch lower and half inch to the left, now wouldnt the dot move to the upper right and appear off bullseye? thus when i shot, i still hit bullseye? its just hypothetical, i dont expect to drill the same bullet hole all day, but it i moved my head to reload or i had a jam, it would seem that when i put my head back it would be somewhat off.... |
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On a typical magnified optical sight there is parallax which requires you to pretty much (eye relief) keep your head/eye directly behind the optic to be able to see the target or you can't see through the scope. A 1X scope such as your BSA, E O Tech or Tube red dot sight like the Aim point do not have any parallax. In essence where the dot is when the gun fires the bullet will strike that point when sighted in.. The red dot can be any where in the field of view of the BSA glass. The advantage of the red dot is that you can quickly pull the rifle up to fire and only find the dot in the glass and put the dot on the target and pull the trigger. This is a lot quicker than having your head in the same spot for a magnified optic. Ideally you have a wider field of view with the red dot because you can shoot with both eyes open. When you sight the rifle in with the red dot its best to shoot prone or from the bench, put the dot on the target and fire a round. If the bullet strike misses the target just adjust the sight to bring the impact closer to the target. Just as a side note you can shoot with both eyes open with a low power optic (Bidon principal) as is done with the ACOG series of Trijicon sights. I'm currently using a 2.5 X 10 power scope and on 2.5 power with both eyes open. I have been able to almost achieve the speed of my red dot sights. When I shoot the red dot or low power optic I bring the rifle into the line of sight with both eyes open observe the dot or cross in field of view and move dot or cross hair over target and squeeze. Very simple and fast. A lot of shooters on this forum sight their carbines to be dead on at 5o Yards (Improved battle zero, IBZ). If sighted in at 50 yards the rifle will shoot about an inch or two high at 100 yards and be close to dead on at 200 yards. At 300 yards I think your about 4 inch low if I remember right. My dept. sights our carbines in at 100 yards. Up close say 25 yards the bullet impact is about 1.5 to 2" low, close to dead on at 50 yards and dead on at 100 yards. At 200 yards your about 4 inches low and at 300 about 12 inches low if memory serves me correctly. I hope this helps........................Sorry I get long winded even in print! |
There was a poster a couple of years ago who did a climatic torture test on the BSA 30. It held up. I had dropped the thing twice now from shoulder length [I am 6', 2.5"]onto a solid concrete basement floor and the RD 30 has still worked flawlessly and retained zero. There is slight parallax at distance with these, but nothing to really be worried about...they will place 5-6 MOA. For the money, you can't beat them!! They are a great little introductory/trial range RD. I still have a couple in use on AR's that I don't shoot very much or very seriously [spare 16" A2 Super-light, and .22LR dedicated Ciener FA blasting machine]. It's interesting that you should bring up those little BSA 30s. Two weeks ago I dug one out of the box of gun stuff, checked the battery, stuck it on to a flat topped railed free floater, stuck an old forgotten 4 X 20 standard rifle scope behind it for fun. Bore sighted and co-witnessed them, headed out to shoot. I was shocked to find out that this 'poor man red neck James Bond' rig works!! There is a slight blooming if you sight out of alignment, but otherwise, decent enough considering all things. Now, it is what it is, and it is no more than what it is. But you can have fun with these things. That's what they're best for...good inexpensive fun...and to be able to judge if you would like to invest in some Aimpoints down the line. |
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