got my 1st shotgun at 11 yrs old, bird hunted, had coon dogs, (night hunting) was a 3rd award rifle expert,(U.S.M.C.) 1 sharpshooter(okinawa range winds sucked AT 500 MTRS.) yes marines shoot w/ open sights(no scope) from 500 yrds. Loved the .50 cal crew served weapon on my lvt, but I think I shot the .60 a little more. My 60 cal never jammed :aoked, our old .50 cals jammed up regularly, I hope they bought some new one since 1984.