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    Kestrel Density Altitude issues

    I took my new Kestrel 4500 out to the range and tried to start recording some data for the day. The density altitude kept wandering, no matter what I did. There was a slight breeze and I held the unit steady at arms length. The numbers either kept climbing or falling alternately. Just did the...
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    Rifle Scopes Ring height for USO 58mm Scope on AR flat top

    Just got a USO SN3 5-25 with a 58mm objective. I need to get some rings for it so that it will clear the rail on a flat top AR (6.5 Grendel) I saw the sticky at the top, but I wanted to ask some of you experienced guys to be certain. Also, any thoughts on a QD base? Pros or cons?