...the ACOG TA31RCO-M4CP's reticle is calibrated for M855 ammunition out of a 14.5 inch barrel under standard atmospheric conditions @ 1000 AMSL...any deviation from this...especially a longer barrel and/or ammunition with different BCs and muzzle velosities will cause strike errors...the greater the range...the greater the error...Ripper said:Want to Zero my ACOG TA31RCO At 50 yards. which position on the cheveron do I use? Is it the tip of the small post under the 200 meter part of the cheveron? Pictures would help. Thanks
...RipperRipper said:I have a 50yrd indoor range in my neighborhood. I will be shooting mostly 55 grain LC M193. My Sig 556 is a 16in barrel. So when I zero ACOG to my 556 at 50yrds, I will use the tip of the little post / 300/25yrd for POA/POI and then when I get to a 100YRD range I should be close Correct? I have the TA31RCO-M4 Acog
...the "dead space" gives you your best point blank range for CQB applications out to ~300 "yards"...you could zero using the dot over target POA=POI @ 200 "meters"...this will give you an approxmate 50 "yard" near zero with most ammunition...and then see where she prints using the BDC with the ammunition "you" are using...your results will vary depending on muzzle velosity and the ballistic coefficient of the bullet...especially at longer ranges...cheney said:Yeah the zeroing instructions are given as dot 100m, illuminated post 300/25m, and so on. No 200m holdover stadia line but it seems that holding in the middle of the dead space between the dot (100m) and the post 300m works well.