Started my hunting with a single shot 22, with cartridges grudgingly doled out by my granfather. Learned to make my shots count. That lesson has stayed with me every since and I tend to pass on iffy shots regardless of the repeat shot capability of the firearm I am useing at the time. Have not kept notes on kills over the years never felt the need, but I am confident that my one shot kills far out number any that required a follow up shot. I have used the unecessary second shot a few times. I have been very lucky and have only lost one big game animal, and that was due to my stupidity at not taking the second shot, was carrying a bolt action repeater at the time. Have hunted over the years with various single shot rifles and never felt handicapped and will do it again. I do tend to have a round chambered when hunting with the single shots but have done it the other way also, depends on the game, terrain, and hunting method.