My Sauer 16 gauge SxS has killed the most raw numbers. No idea how many peasant, grouse, quail, dove, etc it has taken over the last 25 years.
For rifles my Pre-64 Model 70 30-06. My great-grandfather bought it in 1948 when his eyes got bad enough he had to retire his Model 94 and get something with a scope. I’ve killed a lot of deer with it as well as coyotes assorted other targets of opportunity. It’s wearing new glass this year and hopefully will add a pronghorn and Carpathian chamois to the tally by years end.