Having shot Sauers for a number of years I have today heard from a second person that Sauer barrels are 'choked' and therefore cannot be shortened. Now I have shot game for nearly 30 years and understand choking in shotgun barrels perfectly well, however, I fail to understand how constricting a solid projectile can be either rational or indeed possible. When I asked this person to explain this his answer was pretty much as I expected ie. don't ask me, just know they are. Being as he neither worked for Sauer or owned one of the aforementioned I let it be. Would anyone who does know anything of this strange peculiarity care to comment either as to the possibility or the efficacy of such an idea?