old gun, new shells

[Craig Larter]

From Sherman Bell's Article in the 2001 Winter DGJ Long Shells in Short Chambers
“Shooting 2 3/4” shells in 2 1/2” chambers does make them produce more pressure-but in most cases it is less than a 1000 psi increase. I see no reason, related to safety, to modify an original 2 1/2” chambered gun to shoot 2 3/4” shells, if the 2 3/4” load you intend to use would develop pressure that is safe in that gun, when fired in a standard chamber!”

[Drew Hause]

Craig: as you know that statement was based on a study of 12g shells
https://docs.google.com/document/d/1...A/edit?tab=t.0

We have NO data regarding using long for chamber 16g or 20g shells.

Again, some modern nominally 2 3/4" shells are shorter than 2 3/4". It was recently reported that Aguila 16s were short
https://trueshotammo.com/ammunition/...1-oz-1200-fps/