Satterlee 10 Round Load Development

[centerfire]

Is a good SD 1 moa load just as accurate at long range as bad SD 1 moa load?

High SD means you have a wider dispersion of velocities (over simplifying). Take out your ballistics calculator, add or subtract 50fps, and look at the drop at various ranges. The difference in drop between the highest and lower velocity will be the minimum mechanical accuracy of your ammunition. A high SD will always group worse than a low SD at longer ranges, everything else being equal.

The real question should be whether or not you should sacrifice low SD's for low load development time and cost.