What gun are you shooting this ammo in? Many older 16s don't handle express loads and may be chambered for 2 1/2" or 2 9/16" shells. If this an older gun, you had better have a gunsmith check the chamber length. If it is an older SXS, you should only shoot fiber wad ammo.
There may be those who say it doesn't make any difference, but it does, and replacing eyes and fingers is much harder than finding the appropriate ammo.
If the gun is new, go to WallyWorld and stock up on Federals. I shoot four different 16s and have mild to heavy loads around, depending on which gun I use. 16s are classic and effective, and I'm glad to see the renewed interest in the bore.
L2S