best way is use pliers, place the bottom end casing in the jaws, connect two links, and push it into the links, then link , push, link push........If it's .308 rounds, don't seat them all the way in the 30-06 links....... the 30-06 link opening is a smaller diameter then the .308 round, the extractor 'claw" may not pull the round out if it's seated all the way in ................ after awhile this hand loading will get real old, real quick, and you'll break down and buy yourself a linking machine