Confused on optics...

[shootist~]

Roger that. Last question: What is the advantage of the 20 MOA AD Recon (same price)?

In a nutshell it adds 20 MOA or (20/3.438 =) 5.8 Mils of upward adjustment to your turret since the mounting rail is canted slightly downward relative to the bore. Benefit is for a true long range precision rifle where you want more up adjustment than is available on the optic. Possibly not desirable if your use includes considerable short range work.

On my .308 bolt gun with a 20 MOA base I have 16.1 Mils available turret adjustment - above my standard 200 Meter zero. With the 5-15 Vortex HS at today's Density Altitude of 4,894 feet, I would need 9.1 Mils to get me to 1,000 Yds with a 155 gr Palma starting at 2,733 fps (just as an example).

On my 18" SPR using 77 grain SMKs reloads starting at 2,709 fps I would need 11.5 Mils above my 200M zero to get to 1k Yds. Kind of a moot point since I consider the AR to max out (practically speaking) before it gets to 1K. I get hits easy enough at 700 Meters (766 Yds) on 12" steel. Assuming a big enough target, I'm sure I could drop some in at 1,000 Yds, (I'm still supersonic at that range), but IMO that distance calls for a bigger caliber.

[skatz11]

I have a SWFA SS 3-9 on my mk12 mod0 style rifle. It's a great scope for the spr platform. Lacks the illuminated reticle but the adjustments are rock solid and the glass is great. Check their sample list website for used or demo scopes.