Couple of comments here.
1st; Recoil controls the operation of a recoil operated semi-auto such as the old Browning A-5. Most modern day semi-autos are gas operated & recoil has virtually nothing to do with their operation, it's the gas pressure.
2nd; Be certain when you load a longer shell into the chamber that its loaded length does not exceed the chamber length. Its fine if a bit of the unfolding crimp reaches up into the forcing cone. It is "Not Fine" if the crimped end of the shell is actually forced into the cone. This increases the resistance to the crimp opening which can raise pressures excessively. This is most times not a problem but could occur if loading a roll crimped 2 3/4" shell into a "True" 2˝" chamber.
Most short chambered American guns had 2 5/8" chambers. Most British ones will be found to measure from 2 916 to 2/58 in spite of the nominal 2˝" classification. Most European ones had 65mm or about 2 9/16" chambers.
