It's plenty long enough for me. I'm not a long range expert, by any stretch of the imagination.
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It isn't not helpful, if that makes sense.
I'd rather have 2" of error at 200 than 8" at 800.
If you don't have a laser range-finder, you are taking a lot of things as fact that are not verified.
Highly recommend getting a decent one, such as this:
http://www.amazon.com/Leupold-RX-100.../dp/B004IGIF54
*Doesn't have to be in Mossy Oak, just happens to be a decent price right now.
ETA: one in black-
http://www.amazon.com/Leupold-112179...ef=pd_sbs_sg_1