Rifle Scopes What glass for my new AAC-SD?

[crowsniper1]

I have a long range 26" .308 with a 6-20x50 scope already set up so the 20" AAC 308 will be for shooting 600 yards + /- .
I have an extra 3-10x40 leupold mildot and a SWFA 6x mildot,both have nice glass but which one would be better suited for this rifle?

 

[Lafayette]

Re: What glass for my new AAC-SD?

I have both optics in question.

The SWFA 6x reticle covers 1moa targets.

I prefer the 3.5-10 but think a 3-15, 4-16 is most appropriate.