I've been reading this 1/8" shorter stuff for years. Agreed, early American side by sides were generally not marked for chamber length and gents have been shooting 2-3/4" paper shells in 2-5/8" 12-gauge chambers forever. So, what were American 12-gauge 2-5/8" paper shells intended for ..... 2-1/2" chambers? What American guns were those? By maker and model please ...... ?
Yup I know that 12-gauge 2-5/8" shells were generally loaded up to 1-1/8 ounce, and 1-1/4 ounce was put up in 2-3/4" shells. So why not just use 2-3/4" shells for everything as is done today? To save the trees by the amount of paper used for that extra 1/8" of hull length?
Also, why did Savage routinely rechamber 12-gauge Foxes that were sent in for repair to 2-3/4" and reproof/stamp the barrels as such? If 2-5/8" chambers were intended for 2-3/4" shells, why not leave well enough alone?
Just some food for thought gents.