G'day from Downunder.
G'day All , I have owned many an average model 1 brno when I still had my gun store all the old cocky's would bring them in to upgrade to a model 2 and my standard practice was to shorten them to 16" barrels and thread them for hush puppies , generally I found the well worn barrels performed better with high velocity winchester bunny ammo and of the hundred or so that passed through my doors I have never had one brought back because of poor accuracy .
Regards Paul .