I only have one Nikon with the BDC reticle (Omega) on my ML barrel for the TC. I never use the "circles". I tried it out on my .22-250 for smacking yotes and while it was fine for me, I wouldn't recommend them for predator/varmint at any serious ranges. I just dialed in my ranges. All my other Nikons have Nikoplex, Precision, and Point Blank. Never experienced much POI shift through the power ranges with them other than the occasional 1 or 2 MOA and that could have been as much my fault as the scopes. (Getting old gives a shooter a good excuse for goofs )