  We report on recent work on a class of renormalization schemes in QCD, termed
the MOMt schemes. None of the renormalization group functions of the eight QCD
MOMt schemes involve even zetas to five loops. A new scheme is introduced for
scalar $\phi^3$ theory in six dimensions where the full Laurent series in the
regularizing parameter of the Green's function is absorbed into the
renormalization constants. Designated as the MaxSbar scheme it is equivalent to
the MOMt scheme in the critical dimension.
