Quoted: Does anyone know what power you need to resolve a .223 hole at 300 yards? Anyone have any experience with that?
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It's not about power. It is about resolution, brightness and clarity.
Figure, take 300 yards, and divide by 20 (for 20x) = 15. So, with 20 power, 300 yards will appear 15 yards away. Can you see .223 holes at 15 yards?
Make it 30x even. That would make 300 yards appear to be 10 yards away.
You should be able to see .223 holes 10 yards away.
Most spotters cannot do this, because along the way of bringing you that light to your eye, there is a loss of light, and distortion introduced.
This is why crappy scopes costing $120 with "24x" power are completely worthless compared to a scope that runs $1,000, but is "only" 10x. You'll see more with the 10x. Same goes for spotters.
Now, at the extreme magnifications (over 20x), no matter what you buy, you can spend $3000 - doesn't matter...you will NOT, repeat, NOT beat mirage and other factors. If there's bad mirage...the best glass in the world isn't going to help. So there is a limit. The idea is which spotters can resolve holes at long range under PERFECT conditions... that's what you're paying for. The ability to see long range only when you can.