Mosins are far from "junk", they had a 60+ year service life, saw action in some of the fiercest and most savage fighting in every weather from hot summers to Arctic blizzards. IMHO "sporterizing" an 1891 adopted design with some design features that are crude and awkward by our standards, that was manufactured and assembled under somewhat primitive conditions, destroying a bit of history...better to start with a recently manufactured modern action. And the 7.62x54R is the equal of 303 British, 30-40 Krag, 308, and any of a dozen commercial rounds.