I am interested in building one but would like to try this cartridge out first.For you gunsmith types, Would it be feasible at all to buy a CZ Model 527 varmint model in 204 Ruger and 24" barrel, Remove the barrel and rechamber to 20 Vartarg.Should have 22" or so of barrel left but I don't know about the rethreading, extractor cut? etc.It could be a "plinker" while building a better one.Comments?