Here is the deal. I have a heavy barell .308 with a Mueller 3-10 Tac II scope. I am reloading for it. My problem is that I have trouble being certain that I am holding in exactly the same place on the target @100yds when test shooting for accuracy. I am thinking I need a higher power scope for this testing. 24x? I have been looking at Weaver T24 target and V24 varmit scopes with the duplex dot reticle. Any thoughts?