Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login
Posted: 5/28/2003 8:20:56 AM EDT
I considering buying an ACOG due to all the cool pics and talk about them. I have a Bushmaster A3 Shorty. It's the 14.5" barrel with the 1.5" muzzle break. Im pretty certain that I want a donut reticle. That means I can get the TA31 or the TA11. But what about the BDC of each one? I still want to be able to use it without having to adjust for differences. Now I know the TA31 is calibrated for a 20" barrel, mounted to the carry handle and shooting 55gr bullets. What about the TA11?
Link Posted: 5/28/2003 12:42:00 PM EDT
Originally Posted By JTodd: What about the TA11?
View Quote
Calibrated the same.
Link Posted: 5/28/2003 2:17:33 PM EDT
A 14.5" barrel with the new 75 or 77 grian round mounted directly to your flat top using a TA11 with .308 donut reticle will track all the way out. There will be of course differences due to the pressure its loaded to but in general its a perfect match.
Link Posted: 5/28/2003 2:32:27 PM EDT
Originally Posted By DevL: A 14.5" barrel with the new 75 or 77 grian round mounted directly to your flat top using a TA11 with .308 donut reticle will track all the way out. There will be of course differences due to the pressure its loaded to but in general its a perfect match.
View Quote
What about a 55 grain (M193) round through a 14.5" barrel and flattop? Is there a donut reticle for that?
Link Posted: 5/28/2003 3:48:38 PM EDT
For a Flattop 14.5" firing M193: Sight in per your manual but at 50yds (or sight in 1.5" high at 100m). You'll be high at 100; but virtually dead on until 600 where you'll be 12" low. This is in the link at the top of the forum. You should check it out.
Link Posted: 5/28/2003 4:31:56 PM EDT
Originally Posted By DevL: For a Flattop 14.5" firing M193: Sight in per your manual but at 50yds (or sight in 1.5" high at 100m). You'll be high at 100; but virtually dead on until 600 where you'll be 12" low. This is in the link at the top of the forum. You should check it out.
View Quote
Yeah, thanks, man. I was reading through that earlier today. I knew that Trijicon has several different models of ACOGs and I was just hoping that one of them was calibrated for a flattop/14.5"/55gr. I guess not, huh?
Top Top