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    Rifle Scopes Shold I get a custom BDC knob on my 1.8-10

    I just had a 1.8-10x37 USO SN3 TPal started. I ordered it with a mil scale GAP illuminated RED, with EREK. I am wondering if I should instead have a custom BDC installed. Assuming I can develop a good load for my 20" LaRue 5.56 rifle it is going atop. Can USO make the reticule accurate enough...