I am wondering what the tick marks mean on the end of some choke tubes.For example...an IGA with 3(III)notches on the end of the tube.I don't have a wrench to remove these as yet and would like to know what the choke of these are?
This is how my Benelli is marked;
0 Notch= Extra Full
1 Notch= Full
2 Notches= Improved Modified
3 Notches = Modified
4 Notches= Improved Cylinder
5 Notches= Cylinder
Hope that helps.



























