Tubes or fixed---IM for 16s and (F) for 23yds and back?---I have both and love my fixed better---Easier to clean---Less to mess with---I see guy changing tubes and I really don't know if they are doing any better---Whats your opi? [email protected]
I've done a bunch of pattern testing. I'm not convinced that you gain that much between IM and Full. So, if I had my choice, I would only have fixed barrel guns. My O/U would be Mod/Full, any SBT would be Full and any semi or pump would be IM or Mod.
When I miss a bird, usually it's me, not the choke. And I think M is fine for 16, and IM~LF is fine for 27.
However, I did ask a highly regarded barrel smith about choke tubes, his opinion was, fixed choke will always be better than tubes.
This is from a guy that can make 90% pattern on the barrels he worked on. And if you want his chokes, he'll have to tune the barrel to match them. He charges a lot of money for his work, and he is dead serious about patterns. I think he knows more about chokes than anyone I know.