I have utilized as a rule of thumb that when shooting steel, use one step more open than I would using lead.

So if shooting full/mod I would go mod/ic with steel. If shooting IC with lead I would go to Cylinder.

That said I normally dont go by Mod or Full terminology but normally go with measurements such as .005/.015 as my standard when using tubes.

This fall I used one of my Grandfathers Guns, a Franchi Eldorado automatic,. I purchased an extra barrel for it because it already had Briley tubes so I would not have to risk one of the original barrels and is my the one steel capable gun I shoot. In it I used an IC (.010) tube when I was shooting dove this last fall.


Michael Dittamo
Topeka, KS