What is the best way to solve a bit of a loose fit in my right boot. I buckle down hard and lose circulation causing my foot to get cold.
You could add a shim under your liner to push your foot upward in the shell, then don't tighten the lower buckles(on top of the foot)---(you already know the result)but be sure to tighten the ankle buckle(second from top) as tight as you can stand, this will hold your heel back in the shell.
Have you shell sized your boots as per the WIKI (how your boots should fit)at the beginning of this section? custom footbeds???