Whatever you're willing to carry.
Primarily, turrets and weight.
I've used a sightron sII modified mil-dot 3-12x42 for almost 20 years now. SFP isn't ideal, but those 3x shots don't require a holdover, and I have plenty of time to get stable and use 12x for the 300+ yard shots I'll be using the mil-dots.
It has enough mag range and good enough glass to work well past what I'll actually shoot at.
25-06 shoots flat enough a 200 yard zero gives me a point blank of almost 300 yards anyways, so your mileage may vary.
Primarily, turrets and weight.
I've used a sightron sII modified mil-dot 3-12x42 for almost 20 years now. SFP isn't ideal, but those 3x shots don't require a holdover, and I have plenty of time to get stable and use 12x for the 300+ yard shots I'll be using the mil-dots.
It has enough mag range and good enough glass to work well past what I'll actually shoot at.
25-06 shoots flat enough a 200 yard zero gives me a point blank of almost 300 yards anyways, so your mileage may vary.