So you own an older Burris with limited adjustment range, and tried to make it into a long range scope...? Fail.

I actually own a C4. Tried it on a whim. Mine is the 3-9-30mm model. I really dig the reticle, and so far it has tracked perfectly to 600yds. Haven't tried it further yet.

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PS. I wouldn't own a Leupold on a dare. You would get better tracking out of iron sights with a ramp.