ACOG range hatches and bullet design

[BrigandTwoFour]

Hey all, hope everyone had a good weekend and hangover day.

In my long list of things to acquire for my collection, an ACOG has been near the top for a long time. I was going to go with a TA33H years ago, but went with the TR24 instead. But I never could shake the desire for a nice compact magnified sight.

As I get closer to actually grabbing one, I remembered something that Doc said a long time ago regarding ballistics. I generally target shoot with 55-62 grain stuff, but my serious shooting (competition) and home defense is done with MK262 clone or 75gr TAP. I recall Doc saying that the ballistics of these rounds were closer to .308 than the 5.56 the ACOG was designed around.

That got me thinking, would it be better to get a .308 ACOG for my ARs over the 5.56 version. This would have the added benefit of being usable on my semi-auto .308s and variants (I see a 6.5 creedmoor in the future...maybe).

Any of you guys with experience in these matters have any input? I know some say the ACOG is a dinosaur when there are nice variables out there, but I'm not worried about that at the moment. I am building up a nice stable of optics for a variety of purposes and want to include at least one lightweight ACOG in that lineup to fill the gap between an RDS and a heavy variable (I plan on the 1-6x SWFA as well).

[sinister]

The 7.62 reticle generally allows you to shoot 73s, 75s, and 77s along the same trajectory out of a 16-inch barrel.

The 5.56 reticle is generally good for 55s, 62s, the 68-grain Hornady, and the 69-grain Sierra Match King.

Shooting 73s, 75s, and 77s and you should be within 1 to 1.5 MOA at 500 to 600 yards.

[BrigandTwoFour]

Shooting 73s, 75s, and 77s and you should be within 1 to 1.5 MOA at 500 to 600 yards.

I assume that is with the 5.56 reticle?

Would the inverse be true of 55/62gr through the 7.62 reticle out to reasonable distances (say...300-400 meters)?

[RyanB]

I was researching two ACOGs. One was calibrated for M855, the other for M80. I intended to put it on a flat top and shoot MK262. What I found is that the F model will shoot 1MOA low at 600y and the E model will shoot 1MOA high. I got the F model because as altitude increases trajectory flattens out.

[BrigandTwoFour]

FWIW the idea that started this thread is no more.

The TA33H does not come in .308 reticle at this time, only crosshair and chevron. I could go up to the TA11, I suppose, but that gets away from the lightweight compact scope I wanted.

[Gutshot John]

Putting aside the ammunition questions...I've owned both chevron and horseshoe versions of the TA-33.

The crosshair/chevron makes a much better precision reticle imo. I've never really seen the virtue of the horseshoe, it's a good compromise between long-range/cqb, but the chevron works almost as well in this role. At distance, however, the chevron is a much more precise reticle beyond CQB distances.

Both reticles work well with practice.