RE: scope power = better accuracy?
Off from a bench where you can hold steady, yes more power will help in most cases. That is why target shooters use expensive high powered scopes, not 7 power.
However if you don't have a solid rest or can't hold the rifle still more power might make it worse.
What do you want to do with the rifle? A .243 shoots plenty accurate and flat enough that higher power may be a help off a steady rest. I would get an adjustable objective as well. You can't hit what you can't see. If you want to shoot little tiny groups you have to be able to aim at something that small with precision. I have a 20 power scope on my .17HMR and it is more accurate than it was with a 3-9 power scope.
I'm talking about shooting 1 inch or better groups at 100 yards though, or aiming at a bullseye the size of dime. If you just want hunting accuracy of 2-4 inches at 100 yards then 7-10 power would most likely be fine. 4X might even work if you have good eyes and practice. I know guys that target shoot rimfires at 50 yards with 30 power scopes though.
Paul
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