Help again please. I spent the day looking for a one piece scope mount base. No luck. Lots that say 10 (weaver #46) but none that call out flat top or different weaver/ redfield base mumbers for front and rear. What's up? or am I just missing the good stuff?

With the "rainbow" trajectory of the really heavy bullets, should I consider a 10 or 20 moa rise in the bases? I've selected a NC Star red dot for close up and low light swamp conditions as well as a 4 X 12 X 44 Simmons for detail work, both with QD medium rings, now I just need a source for mounts. Any help is sincerely appreciated...

Paul in da swamp