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Posted: 10/30/2013 2:13:56 PM EDT
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I`m looking for a 308 Acog for my Colt 901. For those that don`t know, it has a 16in barrel and a flat top upper.
I`m leaning towards the TA01B, TA11J-308, TA11H and the TA01NSN-308. Which one is the best for my platform? |
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Below are the BDC #'s from trijicon cs for the ta-11e which I run on my 901. Tested so far to 500 yds with 168 gr win. Supreme and 175gr. GMM. Both were close enough the hit 12 inch steel plates. I think the 175 is hitting about 3" low.
We do list this optic calibrated based on 175 gr ammo at 2651 fps. I have provided the subtensions for your convenience and contact us if we can be of further assistance. 100 meter ZERO is tip of Chevron 2.2 moa to inside tip of Chevron, 200 m 4.7 moa to tip of BDC, 300 m 8.3 to 400 m 12.4 to 500 m 17.0 to 600 m 22.3 to 700 m 28.4 to 800 m Thank you Trijicon Customer Service Representative Trijicon, Inc. |
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I believe the ta11j308 Bdc is calibrated for 175gr out of a 22" barrel (not sure on fps)
I've used the ta11c which is calibrated for 168gr at 2500 fps. On my mega maten 16" shooting AE 168gr OTM the Bdc is close enough out to the 700yd mark. It works well with 75gr on a 5.56 too. I've put it up for sale though, I'm switching to an moa adj scope instead. |
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Quoted:
1st ,tacked topic/faq Quoted:
Quoted:
which page? I've looked and cant find any ACOG bdc info. I don't see it either. Can you link? Looked yesterday and again after your reply and don't see it anywhere in the 31 topics in the FAQ, or the very extensive first page and 1/2, checked Armalite forum FAQ, checked ".308" FAQs in the "AR15 Varients" section...... ?????? |
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Quoted:
Many people run the 223 Acogs. They have a similar trajectory Hmmm, was all set to post how rediculous that was until I looked at on online ballistic calculator. Surprised to see only 5 inch diff at 500 yds! 800 yds it was off 20 inches (.308 v. 223) but still a lot closer than I was expecting! Good to know. |
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Quoted:
Hmmm, was all set to post how rediculous that was until I looked at on online ballistic calculator. Surprised to see only 5 inch diff at 500 yds! 800 yds it was off 20 inches (.308 v. 223) but still a lot closer than I was expecting! Good to know. Quoted:
Quoted:
Many people run the 223 Acogs. They have a similar trajectory Hmmm, was all set to post how rediculous that was until I looked at on online ballistic calculator. Surprised to see only 5 inch diff at 500 yds! 800 yds it was off 20 inches (.308 v. 223) but still a lot closer than I was expecting! Good to know. Start playing with different bullets and there is a ton of overlap. The funny thing is there is a huge group of calibers that all fall within the same general group. Since none will match exactly just get what you want and find out how it applies to your setup. |
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I know that Trijjicon claims the difference in barrel lengths/bullet weights is usually within the thickness of the lines (so it isn't critical to use the exact bullet/barrel that the ACOG was built for).
I was quite surprised that the .223 and .308 are as close as they are! |
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Quoted:
"I was quite surprised that the .223 and .308 are as close as they are!" not to drag this thread too far afield but do you think I can use my TA31F on top of an FAL? I'm typically only going out to 300 yards and use mainly milsurp NATO ammo. Of course you can it is just a question of how close you want it to be. My guess is that it will work fine as is. If you know the speed of your loads you can play with a ballistic calculator and change your zero to make it even closer. If you already have it what do you have to lose? |
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Quoted: "I was quite surprised that the .223 and .308 are as close as they are!" not to drag this thread too far afield but do you think I can use my TA31F on top of an FAL? I'm typically only going out to 300 yards and use mainly milsurp NATO ammo. Quoted: "I was quite surprised that the .223 and .308 are as close as they are!" not to drag this thread too far afield but do you think I can use my TA31F on top of an FAL? I'm typically only going out to 300 yards and use mainly milsurp NATO ammo. AR15 vs AR10 drops (M855 vs win M80) 100 yrd zero 16" and 20" barrles 2.5" sight height ar15 ar10 16 20" 16" 20" 100 1.9 2.0 1.6 1.6 200 1.4 2.1 .2 .2 300 -5 -3 -9 -9 400 -20 -16 -24 -26 500 -44 -37 -49 -52 600 -81 -70 -87 -92 700 -136 -119 -138 -145 800 -214 -187 -207 -217 |
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diff in 175 and 147 gr if you zero the acog at 45 yards and shoot only 147gr FMJ range BDC 147gr/2250 diff range BDC 147gr/2250 difference 0 -2.5 -2.5 0 50 -0.6 0.2 -0.8 100 0 1.5 -1.5 150 -0.8 1.1 -1.9 200 -3.2 -1 -2.2 250 -7.2 -5 -2.2 300 -13 -11.1 -1.9 350 -20.7 -19.6 -1.1 400 -30.5 -30.7 0.2 450 -42.5 -44.6 2.1 500 -57 -61.8 4.8 550 -74.1 -82.5 8.4 600 -94.1 -107.1 13 650 -117.2 -136.2 19 700 -143.8 -170 26.2 750 -174.1 -209.3 35.2 800 -208.5 -254.4 45.9 850 -247.3 -306 58.7 900 -291 -364.5 73.5 950 -339.9 -430.5 90.6 1000 -394.5 -504.6 110.1 |
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Ta33g-12 (308 crosshair) MOA subtensions per trijicon:
Thank you for your inquiry. Please see below for the requested information 100 & 200 use the center of crosshair 300 meter -4.8 400 meter- 8.5 500 meter – 12.8 600 meter – 17.8 700 meter- 23.5 800 meter- 30.1 900 meter- 37.7 I hope this helps. If we can assist you further please feel free to contact us. Sincerely, |
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