So wifey hit me with an awesome surprise this week and bought me the Primary Arms ACSS HUD .308/.223 I've been wanting to put on my 308 (the 308 I'm saving for, that is) but I've got a carbine so I figured what the heck!
Primary Arms advertises that it will work with SOME 223 loads. The ones listed in the instruction book are as follows: 75 gr HNDY @ 2750 fps, 75 gr AMAX @ 2750, 77 gr SMK @ 2800, 55gr FMJ @ 2950 and 62 gr FMJ @ 2900.
Today I was shooting 75 gr Hornady Match and Norma Tac 223 in 55gr.
First impressions- The reticle is incredibly user friendly. I love the chevron inside the horseshoe, it didn't obstruct my vision at all and I was able to establish a consistent POA to work from. Parallax left little to be desired. My biggest issue was that the numbers on the dial were more like suggested indexes. They got me in the ballpark, but I had to move my head each time I adjusted my range in order to get rid of the parallax. Dialing in the turrets to zero was pretty easy, though I'll admit I pretty much used SWAG to get within 3 moa of center, then walked it in from there a couple 1/10's at a time. When it came time to slip my turrets, it was easy enough, getting them off took a bit more force than I expected but they came off and went back on without incident. The only issue I had is that the teeth that seat the turret did not line up in a way that allowed my zero to be directly on the line, so I've noted that my "zero" is actually .05.
Now for the WTF moment... I zeroed at 100yds with the 75gr because I can get a better deal on it. So assuming that they're both pretty flat shooting, I took a couple shots at 50yds with the Norma 55gr to see the difference in elevation. Hell if the 55gr wasn't sighted in too! (It lined up perfectly with the 400yd graduation on the BDC) I mean, it was center punching 2" diamonds. I don't know what kind of math I'd have to do to calculate that but sometimes dumb luck is amazing. Now I can shoot bullseyes at 50 and practice marksmanship at 100 with a simple ammo swap. I'll be damned...