over 30 years ago my father had a small argument w/a neighbor who happened to be a masterlock rep. that my dads hunting rifles would not bust open these locks, my father tried to explain that these . 30 caliber carbine's used in then ads were not representative of modern . 30 cal hunting rifles
but it fell on deaf ears. at the next neighborhood party (which happened to be @ the masterlock guys farm, my dad took three rifles a . 223 rem, a 30-06 & a . 378wm and at about 50yds. all three blew those locks to smitherines.