Others should do as they feel necessary, but I don't sweat the 1/8" difference in my 2 5/8" chambered Foxes. I have shot them with SAAMI loaded 2 3/4" shells for many years and will continue to do so. I just have not seen any reason to pay $119 for shells for them (non-tox excluded). Tests have proven that there is extremely little pressure rise from using shells that are 1/8" long for the chamber. The 2 5/8" chambers were intended for 2 3/4" shells of that day.
Some think that heavy recoil is guaranteed by high pressure, but it is not. Neither is low recoil guaranteed by low pressure. I can load a 7500 psi load that I guarantee will get your attention in a sub 7# gun, and it's no good on the head of the old stock, either.
The old Foxes are much better served by paying attention to the recoil than worrying about the pressures, IMHO.
SRH
