Originally Posted By: L. Brown

However, I know for a fact that the NID 16's, and I think the 20's as well, did not originally appear with 2 3/4" chambers. And the old 2 1/2" 20's and 2 9/16" 16's were not the equivalents, in terms of pressure, of some modern 2 3/4" shells. I'm sure a lot of NID's have held up shooting modern factory shells, even if they started life with short chambers. But it's not something I'd recommend.


Then Larry can you explain the difference in "strength" between an Ithaca NID 16/20 gauge, A. H. Fox 16/20 ga and LC Smith 16/20 gauge guns with 2 9/16th/2 1/2 inch chamber lengths and the same guns with 2 3/4 inch chambers when the materials and dimensions of receivers and barrels are identical?