Nice loot DD! I was there on Thursday afternoon. The tide was up to the dunes and the surf was so rough I could not water hunt. I found a little clad in the sand.
those are 19"42"--(SL) st louis armory 50 cal shells from airplane machineguns doing "practice" runs -- they were learning how to "strafe the beaches" in prep for landings overseas during WW2-- dummy cut out plywood soldiers and trucks and such were put on the beach and attacked by planes from nearby airfeilds during 1942 ro 1944 time frame
psst theres a 1810 -1816 era british lumber trade wreck just off main beach(its the marked wreck on the charts) --- and theres another wreck "marked "{as foul area }" on the charts --near the 9th street area --be on the look out for plate shards to help guide you in your hunt-- spanish coins were the common money of the time back then -- Ivan