Loose mobil choke tube

[Skrippa]

have a Beretta ES 100 Pintail. Occasionly I find that the choke tube has loosened after a days shooting in the field( loose enough so that I can turn it with my finger in the choke tube) After cleaning the gun I am careful to tighten the tube with choke wrench. Anyone have any suggestions ?

 

[mdbuckle]

My chokes loosen up too, but I do believe that it is normal. The barrel heats up faster then the choke tube during firing which causes it to loosen. Just check your choke from time to time.