I have a question I need help with about my TA31RCO-A4 ACOG. Its mounted on a 20" 1:7 M16A4 Clone build I have and I have it zeroed as intended at 100m with Federal XM855. My zero group size was .475 MOA I am very pleased with the optic and barrel combo. Anyway I was playing with a ballistic calculator (strelok pro) on my ipad and it has a setting to see the bullet drops displayed with a TA31RCO-A4 Reticle and the ammo you punch in or choose from a list. Several XM855 loads are available to choose from. I did ran the calculations with XM855 and noticed that the aimpoints aren't exact ie 100m is 100m like it should be but the 300m aimpoint is really 295m, 400m is 392m, 500 is 489, 600 is 588, 700 is 692 and 800 is 799. I know the aimpoints probably aren't 100% correct but shouldn't the ACOG be setup so that the 600 meter aimpoint isn't 12 meters off? Is that a little bit too big of an offset at that distance considering this ACOG was specificly built for this round? I can see a few meter (5 of so) off at each aimpoint but 12 meters seems a lot especially at that range. I asked trijicon about it and they said they can not tell me what spec the M855 load its calibrated to nor can they answer any questions about this optic period, I found that response weird so I emailed them again and got the same response. And yes before I get asked I do have OCD with some things.
Bookmarks