hey sonny, i take offense at your statement "it's only old guys".
#1 stupid statement, you don't have to attend hunter safety to own a gun. you only need hunter safety to get a hunting license. so stick that one in your ear.
i'm pushing 70 and i have never shot any one accidently however i have shot a bunch of folks on purpose. the people i hunted with when i first started out were very specific about safety even in the 1940's. and i remember parties of hunters where you would find 20, 16 and 12 guage shotguns and nobody got shells mixed because they were careful. well some folks did but they were dumb butts to begin with. people like that need to be removed from the gene pool, preferably before they start breeding.
i have been reloading for 50+ years and still have all my digits, both eyes in working order and all my male body parts. when i started reloading the only manuals i could find or that were available were lyman and speer. we used to have to extrapolate powder charges. the only place that had chronographs was h. p. white labs and the aberdeen proving ground. i could mention here some loading practices that were prevelant in those times but they would serve no useful purpose. the old timmers will know what i'm talking about.
so i don't want to hear it's only old guys that cause accidents, that is pure male bovine excretment. unfamiliarity, disrespect and lack of firearm knowledge causes accidents. not old people. you don't get old by being stupid.
age has nothing to do with it. you can be 10 or 90, and if you aren't safety conscious you can hurt something or somebody.