The bow and arrow had not yet been invented on the plains so spear hunting was widely used, especially the atlatl. The high concentration of points found in the archaeological record during this time could indicate that groups of people were now larger, or coming together to form large groups, during the plentiful summer months.
Points from the different traditions like the Oxbow, Pelican Lake or McKean-Duncan Complex show a variety of new forms compared to the older lanceolate type points. These new atlatl points are smaller in size and, in some cases, have notched edges for hafting to spears. These tiny points show a new skill requirement that would have taken years to master.