I have 2 brand new Chip McCormick , 10 rounders , 2 tripp 10 rounds , 2 Wilson 10 rounds . Shot them all yesterday at in IDPA match . With one in the chamber then 10 in the magazine the only ones you didn't have to slam in and I do mean slam in are the tripps.I am shooting them in a Springfield 9 mm . They all work the same after 2 rounds are gone. Have not tried the dawson, but understand tripp makes the tubes for dawson and dawson puts on their base pads, but I have been wrong three times today already. From my limited experience I would use the tripp's.