What is the ACOG TA-33 calibrated for?

[ram2390]

My setup is a Colt 6920 firing M193 ammo. Will this work with the ACOG TA-33 BDC? Or will I have to adjust? What's the TA-33 default calibration?

thanks.

[beantamug]

62 grain M855 out of 14.5 inch barrel with a flat top upper. Unless you have a .308 model.

A small difference in barrel length and bullet weight wouldn't bother me.

Lots of ACOG BDC info here:
http://www.ar15.com/forums/topic.html?b=3&f=18&t=229420

[rob_s]

When I first got mine I zeroed it, and then checked the hashmarks for approximate holdovers. Of course, I've since forgotten what they were...