I think your theory is misguided ,Lewis used as cast and unless you lift weights you (NEED) a short starter Lewis being an exception doing logging . Those that engrave upon loading are meant to engrave upon loading ,sizing will defeat the purpose of that design . Paper patching is another story , my long range shooting with a C Sharps 1874 /45/70 was PP using a 443 Baco mold and now the same with a 74 Pedersoli using a 444 Baco eliptical . One thing they both shared is like most LR shooters of full bore conicals /bullets they are used (as cast) !!! Also I suspect greasers too , and every flat base conical of the engraving type shoots better and with the REAL type way better . My paper patch gets a poly .60 every time ,no exception/ With your conical Lewis mentions if it happens with pure (moving off the powder) he adjusts his alloy to 40-1 ( a little harder) and it stays put sizing is not in the equation //Ed