Re: HAMR or ACOG...Opions?
Rhino,
As I said before (I think), I have had a good bit of experience with ACOGs, but have never shot a HAMR. In any case, I would highly recommend trying before buying any ACOG, if you aren't familiar with them. The eye relief on them varies by model and you really can't make any judgments based on their published specs.
I can say that I've never shot a 4X ACOG that I liked. I found the eye relief to be too short and that made shooting in awkward positions difficult for me.
You also have to keep in mind that ACOGs are specialized optics and I personally find that they don't do well as general purpose optics. Of course, opinions differ. Another thing to consider, in light of your reference to the BDC reticles, is that these reticles are calibrated for a specific weight bullet in a specific caliber moving at a certain velocity when it leaves the muzzle.
As much as I like ACOGs, the only one that I'm running now is a little TA44S-10, 1.5X model. I suffer from astigmatism and my eyes are getting old. I use it as a compromise between an Aimpoint and Eotech. It has the rock solid reliability of an Aimpoint with a reticle similar to that of an Eotech. You'd be surprised at how much of a difference that little .5X magnification makes. I have no problems hitting golf balls at 100 yards and beyond.
Like the other poster above, I found the compact Nightforce scopes to be better general purpose optics. I have one each of the 1.4X and the 2.5-10X. Heck, for around $500, you could get into a Vortex PST. That scope isn't shabby at all.