Either of the scopes you mention would do the job with target turrets. I am exceptionally pleased with my conquest 6.5-20X50.
As far as distance goes, I set my max limit to 1000 FPE with my 270 cal. The 140 NAB starting out at 3640 shows 1003 FPE @ 1025. yds. If the energy drops below that number I just don't shoot at anything larger than a deer. I have no idea if that is a good number but it's one I'm comfortable with.
go with the double dovetail bases and Burris signature rings with the inserts for up to 20 MOA. This is an economical but sturdy as hell setup.
I would go with a variable scope and target turrets.
I would not shoot the final finish in it until you see IF you need it. How does it shoot and how does it clean up? agree start with only half the number of rds loaded with the grit, otherwise you risk really opening up the throat. You can always come back in and redo if necessary.
I am thinking i may take the Zeiss 4.5-14X44 off of my 22-250 and put it on my 270WSM. Then i may look at the super sniper for my 22-250. This is a model 12 bvss and will be used primarily for prarie dogs. I think i want the adjustable power for a big game rifle and a fixed power would be alright for my 22-250. Does this make sense or should i look at another brand. In the super sniper would 20X be good for my 22-250 or shoul i go smaller. Also back to the stock. Does anyone know anything about the stockade or would the bell and carlson or HS be better. Also what stock would be good to look at. Since this is a more medium range gun i would like to have a stock that i could shoot off hand if need be. When a build a bigger caliber round i think i will look for a stock that is more for the prone position. Does this make sense or should i do something else. Thanks for all the help.