Joe, before I will ask you some question reg. this small piece of cardboard I have to tell you, that in Europe according to CIP 67.5 MM cases is OK for 65 MM chambers. Most Europian cartriges for 65 MM chamber guns loaded in 67.5 MM cases.
No one official will never tell you your gun with 2 1/2" chambers is OK for 2 3/4" cartriges, light or hot it doesn't matter in this case.
Both of these paragraphs are
dead on and based on "facts".........
Geno: - 67.5 mm o.k. (2 9/16) but NOT 70 mm (2 3/4)........is that correct Geno...?........
Eley makes 67.5 mm 16's, 12's and 20's........Eley's available UK and on the Continent only now.....they were available in the U.S. about four years ago, through the Eley, Austin, TX dealer........who is now defunct........The Italians make them as well....and the Americans, Spanish, Russians, Dutch, Germans, French, Swiss, etc.......SO, lot's of folks shooting 2.5" guns all around the world.....with the proper size ammo.........interesting........