its hard to get some of the old millitary guns like the springfield 03, enfield p14 or lee enfield not to fire. those old guns went through some searious torture back in there times and most of them still keep kicking. my most reliable gun would be my good ol enfield .303 since its 96 years old and still prints under a 7/8 group while its wearing a scope. a second very close runner up would be my ruger no.1, it may have given me some problems at the start but its working like a swiss watch now.